Amoeboid Changeling + Avatar of Woe + Faces of the Past

Amoeboid Changeling

Avatar of Woe

Faces of the Past

How it works

1. Activate Amoeboid Changeling's first ability by tapping it, giving Avatar of Woe all creature types until end of turn.
2. Activate Avatar of Woe by tapping it, destroying target creature.
3. When the creature dies, Faces of the Past triggers, untapping Avatar of Woe, Amoeboid Changeling and any other creatures that shared a creature type with it.
4. Repeat from step 2 as desired.
5. You may repeat this loop whenever a creature enters the battlefield under an opponent's control.
6. You may also target another creature using Amoeboid Changeling after the first activation each turn to untap them when Faces of the Past's ability resolves.