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