Momyt, Spoiler of Schemes

+1: Create a 1/1 red Sliver creature token with "Other Sliver creatures you control get +1/+0."
-X: Counter target spell with converted mana cost X. You may activate this ability at any time you could cast an instant, up to once per turn.
-8: You get an emblem with "Whenever an opponent casts their first spell each turn, counter that spell."