Creature â Wurm
When Sifter Wurm enters the battlefield, scry 3, then reveal the top card of your library. You gain life equal to that card's converted mana cost.
The converted mana cost of a split card is determined by the combined mana cost of its two halves.
Once Sifter Wurmâ€™s triggered ability begins to resolve, no player may take other actions until itâ€™s done. Notably, opponents canâ€™t try to change your library after you scry but before you reveal the top card of your library.
For cards in your library with in their mana costs, X is considered to be 0.