Spell Swindle

Counter target spell. Create an X/X green Ooze creature token, where X is that spell's mana value.

Counter target spell. Create X 1/1 colorless Thopter artifact creature tokens with flying, where X is that spell's mana value.

Counter target artifact or creature spell. Discover X, where X is that spell's mana value. (Exile cards from the top of your library until you exile a nonland card with that mana value or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Counter target spell. At the beginning of your next first main phase, add X mana in any combination of colors, where X is that spell's mana value.

Counter target creature spell. Draw cards equal to that spell's mana value.

Counter target spell. If was spent to cast this spell, that spell's controller mills X cards, where X is the spell's mana value.