Tithe [Visions] SM161 you can activate it once

you can activate it once as this card's effect

Set: Shadow Specters Card type: Xyz/Effect Monster Rarity: Rare Attack: 1000 Defense: 1000 2 Level 2 Beast-Type monsters Once per turn: You can detach 1 Xyz Material from this card

Set: EX: Legend Maker Type: Fighting Rarity: Ultra Rare Retreat cost: Colorless

Those creatures have "This creature's power and toughness are each equal to the number of creature cards in its controller's graveyard

Tithe [Visions] SM161 you can activate it onceSet: Visions Type: Instant Rarity: Rare Cost: {W} Search your library for a Plains card. If target opponent controls more lands than you, you may search your library for an additional Plains card. Reveal those cards, put them into your hand, then shuffle.