Azghal, Hell Knight of Azmodeus // Thorne, Bloodknight of Glasya
: Ward - Pay 9 Life. Affinity for Devils.
At the beginning of each player’s end step, Azghal deals 1 damage to that player for each creature they control that did not attack that turn.
+1: Until your next turn, Azghal becomes a 4/5 Vampire Devil Knight creature with Defender, Doublestrike, Absorb 5 and Indestructible that's still a planeswalker.
-8: Search your deck for any number of Devil creatures and put them into play. They gain haste until of turn.
: Azghal, Hellknight of Azmodeous can be your Commander.
When Azghal would die, transform it instead.
Bloodthirst 2, Protection from Black, Haste, Lifelink, Doubletrike
{B}{B} : Thorne gains Indestructible until the end of the current phase, tap Thorne. Damage from white sources ignore this source of indestructible.
{B}, Sacrifice a creature: Put a +1/+1 counter on Thorne.
Each black and red instant and sorcery spell you cast has conspire.
His numbers are not anywhere close to final and will need to be shifted a lot (hence asking yall).
The general idea - While he is on board he has a static "encouraged to attack" because the Boss had an aura that hurt the PCs the further away from him they were.
Then, each turn would just be +1 him making him a creature that hits back when attacked. Doublestrike means (excluding other first strike) an attacker needs a body big enough to survive. The absorb is reflecting his body (like trample over his creature body into his loyalty body), in that damage over his creature body WILL remove loyalty counters. Unlike Gideon, but like Arlinn.
So, it becomes a kind of timer. Sending in creatures to punch him in the face so he cant reach his finale ability.
Instant planeswalker damage spells on his turn would also hurt him, because they could blast in before he gains absorb.
Like I said, the actual numbers for all of his stuff isnt tuned to make sure it is actually killable, but also isnt improbable to ever get to his -8.
Power and toughness and cost are 9's mostly for thematics of serving Azmodeous.