The Great Goblin + War Elemental + Psychic Paper

The Great Goblin

War Elemental

Psychic Paper

How it works

1. Put a counter on War Elemental.
2. The Great Goblin's first ability triggers, as War Elemental is a Goblin, Orc or Army due to Psychic Paper, dealing 2 damage to an opponent.
3. War Elemental triggers, putting a +1/+1 counter on it.
4. Repeat from step 2.

This clever loop relies on Psychic Paper to completely redefine War Elemental's identity, choosing a creature type like Goblin so it satisfies the tribal requirements of The Great Goblin. Once that foundation is set, putting a single counter on War Elemental triggers The Great Goblin to deal 2 damage to an opponent, which in turn causes War Elemental's static-like triggered ability to add +1/+1 counters back onto itself. That injection of new counters immediately re-triggers The Great Goblin, creating a self-sustaining loop of escalating damage and growth that effortlessly closes out the game.