Its a bit pricey at 9 mana, but in formats like Commander where big mana is common, this card can completely warp the game
If this creature is your commander, this strategy is called Voltron (e.g
Outside of ghoulish overkill, it can always attack and pump the team for +2/+2 and trample, which isnt the most exciting floor, but you only need to gain two or three life before attacks for this to feel overwhelming
I think it will mostly see play in decks aimed more at the moderate competition level, not at the highest level of competition, where there are decks with capabilities to easily dish out damage that dont rely on a character questing
Gamers are thrown into the Duel of Legend Cup and pitted against 20 characters from the series, some exclusive to the game
However, some crazy bastard made an OTK Deck (A Deck focused on killing your opponent within a turn) out of the guy