Lullmage Mentor + Mondrak, Glory Dominus + Doubling Season + Exalted Sunborn

Lullmage Mentor

Mondrak, Glory Dominus

Doubling Season

Exalted Sunborn

How it works

1. Whenever an opponent casts a spell, activate Lullmage Mentor by tapping seven untapped Merfolk, countering that spell.
2. Lullmage Mentor triggers, creating a total of eight 1/1 Merfolk creature tokens.
3. Repeat.

By cycling through Lullmage Mentor's activated ability to continuously counter your opponents' spells, you trigger its own first ability to generate a Merfolk token. Thanks to the compounding token-multiplication effects of Mondrak, Glory Dominus, Doubling Season, and Exalted Sunborn all working in tandem, that single token trigger explodes into a massive swarm of creatures. This sudden flood of bodies easily provides the seven untapped Merfolk you need to pay Lullmage Mentor's tapping cost again, creating a self-sustaining engine that completely locks your opponents out of the game.