It doesnt gain a static bonus, but gives base 1 power creatures haste
That is a big part of why most copies today trade as singles rather than fresh pulls
Whirlipede 133/86 Loading
Partner (You can have two commanders if both have partner.) Legendary Creature - Goblin Pirate Brothers Yamazaki Bushido 1 (Whenever this creature blocks or becomes blocked, it gets +1/+1 until end of turn.) If there are exactly two permanents named Brothers Yamazaki on the battlefield, the "legend rule" doesn't apply to them
We're going to start with some hard numbers (brought to us by Frank Karsten, because despite his description of "basic" I have no idea what hypergeometric formulas are - hey, I'm a musician, not a mathematician!), then talk about reasons why we might adjust those numbers some based on goals, play styles, and desires