Kalamax, the Stormsire + Twincast

Prerequisites

• You have an additional castable instant.

Steps

1. 1Cast any instant by paying its mana cost.
2. 2Holding priority, cast Twincast by paying its mana cost.
3. 3Kalamax's first and second abilities trigger.
4. 4Resolve the first ability, creating a copy of Twincast and choosing to copy the original Twincast.
5. 5Resolve the second ability, putting a +1/+1 counter on Kalamax.
6. 6Resolve the Twincast copy, creating a copy of Twincast.
7. 7Kalamax's second ability triggers, putting a +1/+1 counter on itself.
8. 8Repeat from step 6 any number of times.

Effects

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