Apart from mutate cards to trigger that ability, I guess you could use Stuffy Doll and Brash Taunter, or fill your deck with cards that grant abilities to your commander like backgrounds and the legendary familiars (Kediss, Falthis, et al)
(2025-06-06) You choose the mode as you cast the spell with tiered
The aforementioned Derevi, Empyrial Tactician and Prossh, Skyraider of Kher are others, along with Grand Arbiter Augustin IV
In the past, Rip used to be a member of the Doorblades, a small band of survivors dedicated to killing the House's monsters, but she left them when she realized that her growing friendships were clouding her instincts, making her less effective as a hunter
[3] A player's 60- or 40-card deck is called their library
1 Terror of Mount Velus