Murderous Redcap, and Cathars' Crusade

Prerequisites

• Murderous Redcap in hand
• Cathars' Crusade on the battlefield
• available

Steps

1. Cast Murderous Redcap by paying
2. When Murderous Redcap enters the battlefield, it and Cathars' Crusade trigger
3. Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control
4. Resolve the Murderous Redcap trigger, dealing an amount of damage to itself equal to its power
5. Murderous Redcap dies as a state-based action due to having 0 toughness
6. Murderous Redcap's persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
7. Repeat from step 2

Results

• Infinite death triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite +1/+1 counters on creatures you control