
Creature — Devil
Whenever a player sacrifices a permanent, this creature deals 1 damage to any target.
3/3

Rewards sacrificing permanents, pairing with sac-matters payoffs.

Repeatable sacrifice outlet to trigger Mayhem Devil.

Sacrifices itself each turn for damage triggers.

Another payoff that grows whenever permanents are sacrificed.

Drains opponents on each sacrifice, similar aristocrat payoff.

Damage/lifegain payoff for creature deaths and sacrifices.

Free repeatable sac outlet that pings while triggering devil.
→ Infinite card draw, Infinite draw triggers, Near-infinite +1/+1 counters on a creature
→ Near-infinite damage, Infinite self-mill, Near-infinite storm count
→ Each opponent sacrifices all permanents they control, Near-infinite damage, Mass Land Denial
→ Infinite colored mana
→ Infinite damage, Infinite sacrifice triggers
→ Infinite colorless mana, Infinite damage, Infinite death triggers
A legendary permanent that is put into a graveyard because of the "legend rule" isn't sacrificed.
You control Mayhem Devil's triggered ability and choose the target, no matter who sacrificed the permanent.
If a permanent is sacrificed to pay a cost of a spell or ability, Mayhem Devil's ability will resolve before that spell or ability. Conversely, if a permanent is sacrificed during the resolution of a spell or ability, that spell or ability will finish resolving before Mayhem Devil's ability is put onto the stack.
Mayhem Devil itself doesn't allow any player to sacrifice any permanents. Its ability triggers whenever a player sacrifices a permanent because some other spell, ability, or cost instructed the player to do so.
If you sacrifice Mayhem Devil, its ability triggers.