Yasharn, Implacable Earth
Legendary Creature — Elemental Boar
When Yasharn, Implacable Earth enters the battlefield, search your library for a basic Forest card and a basic Plains card, reveal those cards, put them into your hand, then shuffle your library.
Players can't pay life or sacrifice nonland permanents to cast spells or activate abilities.
Illustrated by
Zendikar Rising#371RareEnglishLegality
Rulings
Yasharn’s first ability can find just one basic Forest or one basic Plains card if you don’t have both in your library or if you don’t wish to find both.
If a spell or activated ability has a cost that requires a player to pay life (such as the activated ability granted by Lithoform Blight) or sacrifice a permanent (such as Kazuul’s Fury or Spare Supplies), that spell or ability can’t be cast or activated.
Other things may still cause players to pay life or sacrifice creatures, such as a resolving spell or ability.