At the beginning of your end step, if you didn't cast any spells this turn, Cascade Basin deals 1 damage to you.

: Add  to your mana pool. Activate this ability only if you control an Island.

: Add  to your mana pool. Activate this ability only if you control a Forest.

: Cascade Basin becomes a 2/2 green and blue Cephalid Wizard creature with trample until end of turn. It's still a land.