Logic Knot [Future Sight] Phyrexian Dog "The trollish game of push-fall

"The trollish game of push-fall inspired this impressive tactic

Whenever Xyru Specter deals damage to an opponent

We don't want any gruesome encores

Set: The Brothers' War Type: Instant Rarity: Rare Cost: {2}{U}{U} Choose two —

Set: The Lord of the Rings: Tales of Middle-Earth Commander Type: Artifact Rarity: Mythic Cost: {3} Whenever you activate an ability

Logic Knot [Future Sight] Phyrexian Dog "The trollish game of push-fallSet: Future Sight Type: Instant Rarity: Common Cost: {X}{U}{U} Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Counter target spell unless its controller pays {X}.