one piece card game illustration box ex Vol. 2 - One Piece Promotion Cards a Fist of Divine Speed booster pack Amazon.com: One Piece Trading Card

This is basically useless against an aggressive red deck as by the time it kills anything you are one burn spell off dead

If a spell or ability an opponent controls targets a single permanent you control more than once, Battle Mammoth's triggered ability will trigger only once

Youre looking for proxies

Baleful Strix is the only four-of creature in our deck, being fine on its own on Turn 2, offering a flying blocker for things like Delver of Secrets and also trading up for bigger creatures thanks to deathtouch but also being great in the late game with Panharmonicon, when its card-drawing enters-the-battlefield trigger doubles up