Thunder Storm

Place a devastating thunder storm in a target 7x7 area.

Upon casting, electricity will fill the storm area. Then for 20 turns, electrified tiles will spread, and Thunder Tornadoes will randomly spawn.

Thunder Tornadoes are 2x2 in size and last 7-12 turns. Each turn, they deal 10-22 Thunder Damage to all creatures within, with a 40% chance to stun.

Electrified tiles deal 5 Thunder Damage each turn to any creature standing on them.