Teysa, Orzhov Scion, and Alter Reality

Prerequisites

• Teysa, Orzhov Scion on the battlefield
• Alter Reality in hand
• You control at least three other black creatures
• available

Steps

1. Cast Alter Reality by paying , changing all instances of "white" on Teysa to "black"
2. Activate Teysa by sacrificing three black creatures, targeting any creature
3. The creatures die, triggering Teysa three times, creating three 1/1 black Spirit creature tokens
4. Repeat from step 2

Results

• Exile any number of target creatures
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers