1. Deploy Icefang. 2. Deploy Grintmaw Shaman and Grintmaw Bouncer. 3. Have them activate Icefang Rumble's self-proc. 4. The ability will go off, deal its damage and give them 2 AP. 5. Why? Proof: @Sokolov
Another bug found: the terrain generation of Invoke: Icefang Rumble is centered on the topmost tile of a 2x2 champion instead of applying all all around the Icefang. If you're unsure what I'm referring to, compare the amount of tiles covered by Icefang Rumble compared to Snowstrike. There should be more tiles covered than what currently happens I believe.