The First Sliver (Retro) [Modern Horizons] S2 you can select up to

you can select up to 2 cards on your opponent's controls and destroy them

It is imperative that its maker be found

during either player's turn: You can detach 1 Xyz Material from this card to target 1 card on the field

Search your library for a creature card with mana value X or less

you may put a creature card from your hand onto the battlefield tapped and attacking

The First Sliver (Retro) [Modern Horizons] S2 you can select up toSet: Modern Horizons Type: Legendary Creature Sliver Rarity: Mythic Cost: {W}{U}{B}{R}{G} Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.) Sliver spells you cast have cascade. A humble appearance belies a master's skill.