If a board stalls out in some midrange mirror, I honestly consider it ending with a card like this often preferable to the game going on for another 30 minutes
For many of the most powerful cards in the game, their power level is balanced out by being extremely expensive to cast (meaning you cant cast them until the late-game), or forcing players to make another big sacrifice to bring it into play
Legendary Creature - Elf Noble Copy (CTRL to add secondary) Counters Counters (CTRL to add secondary) Creature Alexios, Deimos of Kosmos Trample Alexios attacks each combat if able, can't be sacrificed, and can't attack its owner
Monstrous Rage Monstrous Rage pushed the boundaries of what a combat trick could be
However, because its an obsolete mechanic, you wont find cards printed with the ability nowadays
This list covers every Mega Evolution era set released so far: Base, Phantasmal Flames, and Ascended Heroes, ranked by current market price