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

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

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

: Treetop Coast becomes a 1/1 green and blue Beast creature with flying until end of turn. It's still a land.