Requires

Murderous Redcap must be in hand. Combine Guildmage must be on the battlefield. Combine Guildmage does not have summoning sickness. Mana needed:

Steps

1. Activate Combine Guildmage's first ability by paying and tapping it.
2. Cast Murderous Redcap by paying , which enters with a +1/+1 counter on it due to Combine Guildmage.
3. When Murderous Redcap enters the battlefield, it triggers, dealing an amount of damage to itself equal to its power.
4. Murderous Redcap dies as a state-based action due to having 0 toughness.
5. Murderous Redcap's persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Combine Guildmage.
6. Repeat from step 3.

Results