The Wall Game

[void_nothing]

Tides of the Dakra Isles 2UU
Enchantment Creature - Wall
Flash
Defender
Whenever an opponent casts a spell that targets Tides of the Dakra Isles, counter it unless its controller pays 2.
At the beginning of your upkeep, look at the top card of target opponent's library. You may exile it.
4UU: Counter target spell unless its controller pays 2.
2/6

Next: A Wall sacred to Erebos.

[Morpic_Tide]

Marsh of the Charnel Bogs 2bb
Enchantment Creature - Wall
Flash, Defender, Deathtouch
Whenever a creature dies, exile target card in a graveyard.
4bb: Target creature gets -2/-2
3/5

Next: A Wall sacred to Heliod, finishing this cycle (which seems to be 2cc, 8 P+T, Flash, Defender and a color-specific keyword, some passive effect and a 4cc activatable)

[JovialJovian]

Mosaic of Heliod's Glory 2WW
Enchantment Creature - Wall
Flash, defender
As ~ enters the battlefield, choose a nonwhite color. ~ has protection from the chosen color.
Whenever a creature an opponent controls deals damage to ~, create a 2/1 white Cleric enchantment creature token.
4WW: Exile ~, then return it to the battlefield.
0/4

Next:
A wall spawned from Emrakul

[void_nothing]

Clouds of the Solar Gates 2WW
Enchantment Creature - Wall
Flash
Defender, lifelink
Whenever a creature deals combat damage to you, you gain 1 life.
4WW: Other creatures you control get +1/+2 until end of turn.
4/4

Edit: Sarnathed!

Moonlight Maw 2W
Creature - Horror Wall
Defender
Whenever you cast a colorless spell, target creature gets +0/+X until end of turn, where X is that spell's converted mana cost.
When you sacrifice Moonlight Maw while casting a spell with emerge, exile up to one target creature with lesser toughness than Moonlight Maw.
0/5

Next: A Wall found in Terisiare (the setting of Ice Age block)

[dyd]

Snowdrift 3g
Snow Creature - Wall
Defender
~'s power and toughness are each equal to the number of snow permanents you control.
Snow landcycling 2
*/*


Next: a Wall built in memory of Rhonas

[Atraxian]

Etched Wall of the Indomitable
Artifact Creature - Wall
Defender
, : target creature you control gets +2/+0 and gains Trample until end of turn.
Rhonas might be lost, but his strength still courses through his worshipers
0/5

Next: a wall made from the remains of one of the three insect Gods of Amonkhet (or from all 3)

[void_nothing]

Archway of Scarab 2UB
Legendary Creature - Wall
Defender
UB, T, Sacrifice another nontoken creature: Scry 4.
Whenever you scry or an opponent loses life except due to damage, create a 2/2 blue and black Zombie Beast creature token. The token has "Whenever this creature deals combat damage to a player, you may tap or untap target permanent. That permanent doesn't untap during its controller's next untap step if it's tapped in this way."
At the beginning of combat on your turn, if you control four or more Zombies, target Zombie you control gets +4/+4 and can't be blocked until end of turn.
0/10

Next: A Wall made from the remains of one of the other two Bolas puppet Gods of Amonkhet.

[Feyd_Ruin]

Scorpion's Barrier
Legendary Creature - Wall
Defender, first strike
Whenever Scorpion's Barrier blocks a creature, put a -1/-1 counter on that creature. When that creature dies this turn, draw a card.
3/2

Next: A Wall made from the remains of The Locust God

[void_nothing]

Courtyard of Locust 3UR
Legendary Creature - Wall
Defender
Whenever Courtyard of Locust is dealt damage by a source you don't control, you may pay UR. If you do, draw that many cards.
Tokens you control have "T: This permanent deals 1 damage to any target."
0/8

Next: An Avatar Wall (or Wall Avatar)

[Atraxian]

Image of Defence
Creature - Avatar Wall
Defender
~ toughness is equal to the total number of creatures your opponents control
~ can block any number of creatures.
2/*+2

Next: an Ojutai or Jeskai wall

[Krishnath]

Wall of Learning 1WU
Creature - Wall (U)
Whenever you cast a spell from exile, draw a card.
0/5

Next: A wall from Pyrulea.

[void_nothing]

Horizon Nest GW
Creature - Plant Wall
Defender
When Horizon Nest dies, create three 1/1 white Bird creature tokens.
5, Sacrifice a land: Return Horizon Nest from your graveyard to your hand.
0/3

Next: A UB non-Dimir-themed wall.

[Atraxian]

Wall of Fear
Creature - Nightmare Wall
Defender, reach
Creatures blocked by ~ don't untap during their controller's next untap step.
, , sacrifice ~: target creature you control can't be blocked this turn.
0/3

Next: a Mardu or Kolaghan wall

[JovialJovian]

Outpost Picket (R/W)
Creature - Wall
First strike, defender
Raid - At the beginning of your end step, sacrifice ~ unless you attacked with a creature this turn.
3/1

next: A wall of ants

[Krishnath]

Mvonvuli Ant Colony 2GG
Creature - Insect Wall
Defender
Whenever Mvonvuli Ant Colony is dealt combat damage, if that damage wasn't dealt by a creature with flanking, create a green 1/1 Insect creature token with banding named Mvonvuli Ant.
0/5

Next: A wall found in a jungle.

[Legend]

Cliff Wall (Uncommon)
1G
Creature - Wall
0/5
Defender
Reach
Cliff Wall can block creatures with landwalk as though they didn't have landwalk.

Next: the wall that commander needs

[Atraxian]

Command Bastion
Artifact Creature - Wall
: Add one mana of any color in your commander's color identity.
: If target spell has only one target and that target is your commander, change that spell's target to another creature.
0/3

Next: a wall for draft sets

[JovialJovian]

Wall of Obstinance W
Creature - Wall
Defender
W: ~ gets +0/+1 until end of turn.
1W: ~ gains flying until end of turn.
0/3

Next:
An Evil Eye wall

[void_nothing]

Evil Eye of Koskun 1B
Creature - Eye Wall
Defender
Non-Eye creatures you control can't block.
Whenever Evil Eye of Koskun blocks a creature, that creature gets -1/-1 until end of turn. Put a +1/+1 counter on Evil Eye of Koskun.
2B, Sacrifice another creature: Target creature can't attack or block this turn.
0/4

Next: A Wall from Vryn or Regatha.

[Krishnath]

Flames of Keral Keep 1R
Creature - Wall
Defender
Flash
3/1

Next: A wall that is transparent.

[Atraxian]

Glass Ceiling
Artifact Creature - Wall
Defender, Indestructible
Creatures blocked by ~ lose trample until end of turn.
"No matter how hard I try, I just can't get through" - Vivien Reid
0/1

Next: a wall made from creature cards in graveyards

[Morpic_Tide]

Ossuary Bastion 3(w/b)(w/b)
Creature - Skeleton Wall
Defender
If a creature in your graveyard or a Skeleton you control has First Strike, Ossuary Bastion has first strike. The same is true for Double Strike, Haste, Persist, Deathtouch, Lifelink and Reach.
xx(w/b)(w/b): Put a non-Artifact creature with converted mana cost X or less from your graveyard onto the battlefield. It's a Skeleton in addition to its other creature types, and has "This creature has the abilities of creatures named Ossuary Bastion you control".
2/6

Next: A Legendary Wall reasonably playable on turn 3 without dedicated support for the mechanic (I.E. Convoke with 5, tapping your reasonably-two-creatures) that acts as reusable "cover" for a "duck and cover" style of deck.

[void_nothing]

Ngapta, Thicket of Qarsi 3GG
Legendary Creature - Plant Wall
Delve
Protection from creatures with trample and/or haste
3GG, Put Ngapta into its owner's library third from the top: Prevent all combat damage that would be dealt this turn. Each opponent sacrifices a noncreature permanent. This ability costs 1 less to activate for each card you exile from your graveyard as you activate it.
0/6

Please try to keep your requests a little more reasonable.

Next: A monoblue Wall.

[JovialJovian]

That you Void, I didn't even know where to start on that last one, like what even is a "Duck and Cover" style deck?

Stubborn Tide UU
Creature - Elemental Wall
Defender
~'s toughness is equal to the number of basic Islands you control.
UU, Sacrifice ~: Until end of turn, whenever you tap a basic Island for mana, add an additional U.
0/*

Next: A wall of, or resistant to, Beebles.

[Atraxian]

Hornet's Nest
Creature - Wall Insect
Defender, deathtouch
~ gets +1/+1 for each other insect you control.
Whenever ~ is dealt combat damage, create a 1/1 green Insect creature token with flying and deathtouch.
0/3

In case anyone else was wondering:

That you Void, I didn't even know where to start on that last one, like what even is a "Duck and Cover" style deck?

In a few words, a deck that has a big creature as a wincon (your duck) and is choke full of cards to protect it like counterspells, blinks and protections like sheltering light (your cover)

Next: a wall either made of fishing nets or shipwrecks