Stormforged Glacier

Stormforged Glacier enters the battlefield tapped
{t}: Add {u} or {r} to your mana pool.
{1}{u}{r}: until end of turn.
Stormforged Glacier becomes a 2/3 blue and red Elemental creature with flying and "Whenever
this creature deals combat damage to a player or planeswalker, you may draw two cards. If you do, discard a card." It's still a land.