It's impressive 170 HP and no resistances and weaknesses are additional benefits.
Section 4 will explain how combat works
Its a creature tutor to start with, and a way to sculpt your hand, but it gets silly if you make use of your graveyard or discarding creatures
The Ace Spec slot includes competitively relevant cards that see play across multiple deck archetypes, adding play demand on top of collector appeal
In the casual Commander variant, you can use an oversize card as your commander - a commander starts the game face up on the table and tends to stay that way, so as above it doesn't hurt that it's oversized
It will also dole out executions, given it not only comes in for cheap in the mid to late game, but gives a mini-Hoof overrun effect too