op09 booster box price Emperors In The New World Pack One Piece Card Game OP-09 English OP9 The New Four Emperors Take the Helm in the 9th Pack ONE PIECE TCG Sealed Case

Splitting Slime You can look at Splitting Slime as a mana sink of sorts

Sacrificing creatures lets you scry 2, giving you excellent top deck control, and then you can exile the top card of your deck to cast itdealing damage equal to its mana value to anything

Five mana to exile most non-land permanents is a lot of mana in an absolute sense, but it could be worthwhile if you are in a color that struggles to find hard removal

Dromar's Charm is a decent example of this providing you with a hard counter spell when you need to protect your board or stop someone from winning the game by providing five life when you're falling behind, or a little -2/-2 to take out a utility creature