Gravitic Punch, Kalamax, the Stormsire, and Increasing Vengeance

Prerequisites

• Gravitic Punch in hand
• Kalamax, the Stormsire on the battlefield
• Increasing Vengeance in hand or in the graveyard
• plus if Increasing Vengeance is in your graveyard available

Steps

1. Cast Gravitic Punch by paying its mana cost, targeting Kalamax
2. Holding priority, cast Increasing Vengeance by paying its mana cost or its flashback cost, targeting Gravitic Punch
3. Kalamax's first and second abilities trigger
4. Resolve the first ability, creating a copy of Increasing Vengeance targeting the original Increasing Vengeance
5. Resolve the second ability, putting a +1/+1 counter on Kalamax
6. Resolve the Increasing Vengeance copy, creating a copy of Increasing Vengeance, targeting the original Increasing Vengeance
7. Kalamax's second ability triggers, putting a +1/+1 counter on itself
8. Repeat from step 6 any number of times
9. Once you have an arbitrarily large Kalamax, have the final Increasing Vengeance copy target Gravitic Punch
10. This'll create two copies of Gravitic Punch in addition to the original Gravitic Punch
11. Resolve all Gravitic Punches, dealing infinite damage to each of up to three opponents

Results

• Infinite magecraft triggers
• Infinite +1/+1 counters on a creature
• Infinite damage