Uragog, Living Cataclysm

At the beginning of your upkeep, place an eruption counter on Uragog, Living Cataclysm.
{t}, Remove an eruption counter from Uragog: Choose one- reveal the top card of your library.
If the revealed card is a mountain, you may put it onto the battlefield. Otherwise, draw a card;
or copy target red instant or sorcery spell you control. You may choose new targets for the copy