one piece card game special goods set Ace Sabo Luffy English – Playmat + Bandai One Piece Special Goods

Lore-wise this is actually a wizard who's fallen victim to mana burn, a now defunct rule in Magic which made players' own unspent mana deal damage to them

in cEDH, Blood Pet is often found in Krrik, Son of Yawgmoth builds as a way to net an extra mana for 2 life, but also sees a lot of play in Inalla, Archmage Ritualist and Ad Nauseam lines to rush out these expensive spells or aid in comboing off with other cards to win the game

So if you have one +1/+1 counter or ten, you are still only getting one more

By proliferating the counters on Agents ToolkitAgents Toolkit, they can make extra counters and move those extras off to make the Toolkit act more like a Bag of Holding from Dungeons and Dragons