one piece card game op03 Japanese Mighty Enemies OP-03 Booster Box such as Sabo One Piece Pillars of Strength

Just one of these can be worth at least $200+

Each of the five colors has a number cards with off-color mana costs in their rules text

Product Details At the beginning of combat on your turn, you may move a counter from target creature you control onto a second target creature you control

Accelerating out bigger spells is something that all rituals are capable of, but doing so without even needing an initial mana investment makes this a uniquely powerful card

You get a solid effect at a reasonable cost either way

While 3-mana rocks are a bit pricey, this one has the massive upside of giving spells you cast repeatedly convoke