(: Add or to your mana pool.)
Obsidian Hollows enters the battlefield tapped.
, Sacrifice a Swamp: Add to your mana pool.
, : Target land becomes a 3/3 green Squirrel Beast creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.), Sacrifice a Swamp: Add to your mana pool.
, : Target land becomes a 3/3 green Squirrel Beast creature until end of turn. It's still a land.
