(
: Add
or
to your mana pool.)
At the beginning of your end step, if you didn't cast any spells this turn, Dragonskull Atoll deals 1 damage to you.
,
: Target land becomes a 2/2 black Skeleton creature until end of turn. It's still a land.

,
: Put a 1/1 blue Merfolk creature token with flying onto the battlefield.