gundam booster box english Card Game Featuring characters and Mobile Suits from series making their GCG debut and developing decks for previously released cards Gundam Tcg English DECSAVE $10

That, plus Start Playing Commander Here and the presence of a single foil mythic, tells me that this set of decks is all reprints

This means it is able to be used like a Quick Effect Spell that can be used from the Hand on both players' turn

If youre the beat down thats not a huge limitation, but the card would be significantly better if it did offer the buff at all times, as it would make it pretty impossible for your opponents to attack you, too

(See rule 508, Declare Attackers Step.) 306.7

Lazav, Dimir Mastermind is difficult to interact with and can become a copy of the most dangerous card that your opponents mill