Uurg's power is equal to the number of land cards in your graveyard.
At the beginning of your upkeep,
surveilTo “surveil N” means to look at the top N cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.
If an effect allows you to look at additional cards while you surveil, those cards are included among the cards you may put into your graveyard and on top of your library in any order.
If a player is instructed to surveil 0, no surveil event occurs. Abilities that trigger whenever a player surveils won’t trigger.
An ability that triggers whenever a player surveils triggers after the process described in rule 701.25a is complete, even if some or all of those actions were impossible. (CR 701.25) 1. (Look at the top card of your library. You may put that card into your graveyard.)
,
SacrificeTo sacrifice a permanent, its controller moves it from the battlefield directly to its owner’s graveyard. A player can’t sacrifice something that isn’t a permanent, or something that’s a permanent they don’t control. Sacrificing a permanent doesn’t destroy it, so regeneration or other effects that replace destruction can’t affect this action. (CR 701.21) a land: You gain 2 life.