Kalamax, the Stormsire + Insidious Will

Prerequisites

• You have an additional castable instant.

Steps

1. 1Cast any instant by paying its mana cost.
2. 2Holding priority, cast Insidious Will by paying its mana cost.
3. 3Kalamax's first and second abilities trigger.
4. 4Resolve the first ability, creating a copy of Insidious Will and choosing to copy the original Insidious Will.
5. 5Resolve the second ability, putting a +1/+1 counter on Kalamax.
6. 6Resolve the Insidious Will copy, creating a copy of Insidious Will.
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