two legends one piece booster box Piece: [OP-08] Case Big Mom Pirates as purple Two Legends - Booster Box

Seven Dwarves | Illustration by Jason Rainville Relentless cards are a reference to the popular Magic card Relentless Rats, a creature with a clause that bypasses the restriction in some Constructed formats where you cant play more than four cards with the same name in your deck

Theres also River Song

Malicious Affliction Doom Blade is strong, but not as strong as two Doom Blades

Creature - Druid Rhino Phelddagrif : Phelddagrif gains trample until end of turn

Ultimately, the ratio of your total number of counterspells versus other interaction versus your actual win conditions comes down to playtesting, personal preference, and the local meta you encounter