Zameck Guildmage's first ability by paying , causing each creature you control to enter the battlefield with an additional +1/+1 counter this turn.
Activate
Phyrexian Altar by sacrificing
Glen Elendra Archmage, adding one mana of any color.
When
Glen Elendra Archmage dies, it triggers its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter and a +1/+1 counter on it.
The two counters are removed from Glen Elendra as a state-based action.
Repeat from step 2 any number of times.
Once you have infinite mana, you amy activate
Zameck Guildmage's abilities any number of times.
Results
Infinite +1/+1 counters on certain creatures.
Infinite card draw.
Infinite colored mana.
Infinite death triggers.
Infinite draw triggers.
Infinite creature ETB.
Infinite creature LTB.
Infinite creature sacrifice triggers.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
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1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.