Zameck Guildmage's first ability by paying ({G} magic symbol) ({U} magic symbol) , causing your creatures to enter with an additional +1/+1 counter this turn.
Activate
Bloodthrone Vampire by sacrificing the
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Persist Creature.
When the
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Persist Creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it and at least one +1/+1 counter on it due to
Zameck Guildmage.
Remove a -1/-1 counter and a +1/+1 counter from that creature as a state-based action.
Resolve the
Bloodthrone Vampire ability.
Repeat from step 2.
Results
Infinite creature ETB.
Infinite creature LTB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Infinitely large creature until end of turn.
Metadata
In 3 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).