Alpha s Grizzly Bears was the first card with the creature type, and it also gave us the slang name of bears for the low-mana 2/2 creature found in many MTG sets, often a creature with no abilities (vanilla) back when those were more common
If youre specifically looking for the best colorless cards MTG has to offer thatll let you make high-level plays via easier setups, then youve just found one of the highest-tier ones there are
I am comfortable with it on the sideboard, too
Not all of them are relevant to every Cube with Armageddon being out of bounds for a lot of environments, but this card is also appreciably weaker than Gideon, Ally of Zendikar
He's still legal, but he's over a hundred bucks, and what you get for that is an absurdly circumstantial card
Introducing Pokmon V-UNION: a single powerful Pokmon divided into four cards