one piece card game op05 card list Amazon.com: BANDAI NAMCO Entertainment Trading Awakening of the New Era Booster Box OP-05 [ENGLISH, 24 Packs] : Toys & Games Emperors in the New World ONE PIECE CARD GAME Booster

No, you do not have to attack everyone with myriad

Khrn the Betrayer This is perhaps the wildest card I've ever made

It does make it impervious to targeted non-exile removal, but this is the kind of creature that needs indestructible when your opponents control creatures

Filling your curve with smaller artifact creatures will fit both flavorwise and mechanically, since your most likely win condition will be combat damage

So, flash is at its best when you cast it at unpredictable times

No, you cant use colorless mana for any color, as colorless mana can only pay for generic costs or specific colorless requirements