Necrotic Ooze + Wizard Class + Cinderhaze Wretch + Niv-Mizzet, the Firemind

Necrotic Ooze

Wizard Class

Cinderhaze Wretch

Niv-Mizzet, the Firemind

How it works

1. Activate Necrotic Ooze using Niv-Mizzet's ability by tapping it, causing you to draw a card.
2. Wizard Class triggers, putting a +1/+1 counter on Necrotic Ooze.
3. Activate Necrotic Ooze using Cinderhaze Wretch's second ability by putting a -1/-1 counter on it, untapping it.
4. Repeat.

By absorbing the abilities of creatures resting in the graveyard, Necrotic Ooze becomes a one-stop shop for absolute devastation. You can tap the Ooze using Niv-Mizzet, the Firemind's activated ability to draw a card, which in turn fires off Niv-Mizzet's triggered ability to ping any target for damage. Meanwhile, Wizard Class at level 3 ensures that every drawn card places a +1/+1 counter onto the Ooze, which cleverly cancels out the -1/-1 counter you must place on Necrotic Ooze to untap it using Cinderhaze Wretch's self-untap ability. This creates a closed loop that nets you infinite card draw, infinite draw triggers, and near-infinite damage to clear the board and end the game.