The Commander's Tools Game

[lookingupanddown]

Banner of Heroes X4
Artifact
Banner of Heroes enters the battlefield with X charge counters on it.
Whenever another historic permanent enters the battlefield, put a charge counter on Banner of Heroes. (Artifacts, legendaries, and Sagas are historic.)
Commanders you cast cost 1 less to cast for each charge counter on Banner of Heroes.
A beacon of hope, calling out to those who can add to that hope.

Next: Erinis, Gloom Stalker // Scion of Halaster

[void_nothing]

Petition the Mycotyrant 4B
Instant
Mill four cards, then create four 1/1 black Fungus creature tokens with "This creature can't block."
Draw a card.
2B, Exile Petitition the Mycotyrant from your graveyard: Creatures you control get +1/+0 until end of turn.

Next: Grimgrin, Corpse-Born

[folding_music]

Air Pocket
Creature - Elemental
Defender
When you sacrifice Air Pocket, draw a card. Creatures you control gain flying until end of turn.
0/3

if MTG was crazy to the degree I wanted it to be:

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Rebreather
Artifact
Rebreather doesn't untap during your untap step.
, Remove two counters of any type from among tapped permanents you control: Untap Rebreather. Play this ability only once each turn.
, : Create a blue 0/0 Illusion creature token, then move any number of counters from other tapped permanents you control onto it. They become +1/+1 counters.

(kinda experimental <3 but Grimgrin is strong and gets to be the best colours anyway, he can use some jank)

next: General Jarkeld

[lookingupanddown]

Battle Tactics 1W
Instant
Target attacking creature gains first strike until end of turn. Another target attacking creature gets +2/+2 until end of turn.

Next: Kylox, Visionary Inventor

[void_nothing]

Kindling Poltergeist 4R
Creature - Spirit
First strike, trample
When Kindling Poltergeist enters the battlefield, put any number of instant and/or sorcery cards from your graveyard on top of your library.
Undying
2/2

Next: Sol'Kanar the Tainted

[JovialJovian]

Accursed of the Chains 1B(U/R)(U/R)
Creature - Avatar
When Accursed of the Chains enters the battlefield, exchange control of target nontoken creature you control and target nontoken creature you don't control.
Whenever a player gains control of a permanent they don't own, they lose life equal to that permanent's mana value.
Whenever a permanent enters the battlefield under the control of a player other than its owner, that player loses life equal to its mana value.
4/4

Next: MacCready, Lamplight Mayor

[folding_music]

Flattery
Sorcery
Strive (Flattery costs more for each target beyond the first.)
Put a +1/+1 counter on any number of target creatures you don't control. You draw a card and you lose 1 life for each counter placed this way.

Pouch of Slingstones
Artifact - Equipment
Whenever equipped creature deals combat damage to an opponent, choose one that hasn't been chosen:
-- Create a Meekstone token. (It's an artifact with "Creatures with power three or greater don't untap during their controller's untap step.")
-- Create a Mightstone token. (It's an artifact with "Attacking creatures get +1/+0.")
-- Each artifact you control deals 1 damage to target creature defending player controls. Then, exile Pouch of Slingstones.
Equip

next: The Tarrasque (he needs it)

[lookingupanddown]

Prophetic Triumph 1GG
Instant
Untap all lands you control. You gain 1 life for each basic land untapped this way. The next creature spell you cast this turn can't be countered. That creature enters the battlefield with two additional +1/+1 counters on it. If that creature is your commander, it also enters with an indestructible counter on it.
Every shaman, druid, and other mage of the natural world felt the immense power entering the world, and rejoiced in the coming of nature's titanic champion.

(I tried)

Next: Amzu, Swarm's Hunger

[Incredium]

Cycle of Decay 1gb
Sorcery
Mill 2 cards. Create two 1/1 green insect creature tokens.
Escape - 1gb, Exile five other cards from your graveyard. (You may cast this card from your graveyard by paying its escape cost.)
Cycling 2 (2, discard this card: Draw a card)

Next: Magnus the Red

[folding_music]

Jeskai Gatebeam
Instant (R)
Jeskai Gatebeam deals X + 2 damage to any target. If X is higher than the number of creatures you control, you create a blue 1/1 Djinn Wizard creature token with prowess and a red 1/1 Efreet Monk creature token with haste. Otherwise, scry 2.

(can't tell if this is too good. it takes so much mana to actually remove a creature with this, though, it's probably alright x3)

next: Trostani, Three Whispers

[lookingupanddown]

Manaform Dryad 1GW
Creature - Elemental Dryad
Lifelink
When Manaform Dryad is turned face-up, add two mana in any combination of colors. Spend this mana only to activate abilities.
Disguise (g/w) (You may cast this card face down for 3 as a 2/2 creature with ward 2. Turn it face up any time for its disguise cost.)
1/3

Next: Commander Mustard

[Incredium]

Blastforge Legionnaire 2rr
Artifact Creature - Soldier
When Blastforge Legionnaire enters the battlefield, create a 1/1 colorless soldier artifact creature token.
Attacking creatures you control get +X/+0, where X is the amount of non combat damage defending player has been dealt this turn.
3/3

Next: Vhal, Candlekeep Researcher // Noble Heritage

[folding_music]

Advance Warning 1uu
Instant
Flashback
Counter target spell. If Advance Warning was cast from your graveyard, instead counter target spell with mana value X or less, then Bolster X. (Choose a creature with the least toughness among creatures you control and put X +1/+1 counters on it.)

or

Confiscation Matrix
Artifact
: Gain control of target creature or artifact you don't control until end of turn and untap it. You may move each counter on that permanent onto another target permanent you control. Sacrifice Confiscation Matrix at end of turn.

next: Eight-and-a-Half-Tails

[lookingupanddown]

Null Moon's Presence 1WW
Enchantment
Other nonland permanents are white.
At the beginning of each opponent's end step, if they control more lands, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.

Next: Herigast, Erupting Nullkite

[Incredium]

Flayer of Futures 9
Creature - Eldrazi
Flash
This spell can't be countered.
Creature spells and colorless noncreature spells you control have flash.
Evoke 1C (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)
It writhes in the horizon where tomorrow once promised to dawn.
9/10

Next: Baru, Wurmspeaker