
You may have Sakashima enter as a copy of another creature you control, except it has Sakashima's other abilities.
The "legend rule" doesn't apply to permanents you control.
Partner (You can have two commanders if both have partner.)
Sakashima of a Thousand Faces has 6 printings, first in Commander Legends (2020). EDHREC ranks it #1,072 among Commander cards. It appears most in Orvar, the All-Form decks (4,253 on EDHREC). It has 18 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.