Infinite creature LTBInfinite creature ETBInfinite death triggers
How it works
Activate Zameck Guildmage's first ability by paying .
Cast Murderous Redcap by paying 2B/RB/R, which enters with a +1/+1 counter on it due to Zameck Guildmage.
When Murderous Redcap enters the battlefield, it triggers, dealing an amount of damage to itself equal to its power.
Murderous Redcap dies as a state-based action due to having 0 toughness.
Murderous Redcap's persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Zameck Guildmage.