Proxies are all about exploring different art styles and layouts that Wizards cant, adding custom imagery to your game, and spicing up your decks
Just attacking with this card and dumping two more creatures is already a huge tempo swing, and if you get Muxus, Goblin Grandee, the game might be over
Anime cards are available much more freely in booster packs of multiple languages and printed in English, though Japanese-language anime art cards are in Japanese booster packs
It's essentially a second copy of Phantasmal Image, so any MTG commander deck that wants to run that may also want one of these (Gyruda players, looking at you)
You need to be packing ways to deal with any source of poison your opponents might throw at you, such as a well-timed The Wandering Emperor or Cut Down to take out an attacking creature with toxic