Genestealer Patriarch + Fate Transfer + Carrion Feeder + Host of the Hereafter

Prerequisites

• You control at least two additional creatures.
• Genestealer Patriarch does not have summoning sickness.
• An opponent controls a creature.

Steps

1. 1Declare Genestealer Patriarch as an attacker.
2. 2Genestealer Patriarch's first ability triggers, putting an infection counter on a creature an opponent controls.
3. 3Cast Fate Transfer by paying its cost, moving the infection counter from the opponent's creature onto a creature you control.
4. 4Activate Carrion Feeder by sacrificing the creature with an infection counter on it.
5. 5When the creature dies, Host of the Hereafter and Genestealer Patriarch's second ability trigger.
6. 6Resolve the Host of the Hereafter trigger, putting an infection counter onto another creature you control.
7. 7Resolve the Genestealer Patriarch trigger, causing you to create a token copy of the sacrificed creature that is a Tyranid in addition to its other types.
8. 8Resolve the Carrion Feeder ability.
9. 9Repeat from step 4.

Effects

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers