Whenever Cadira deals combat damage to a player, for each token you control, create a 1/1 white Rabbit creature token.
Get Cadira through for combat damage, then exponentially multiply your token board: she creates a 1/1 Rabbit for each token you already control. Build a starting token base early, connect with an evasive/protected Cadira once, and convert the explosion of bodies into a lethal overrun the next turn.
Exponential token generation that snowballs out of control after a single hit
GW has the best token doublers, anthems, and overrun finishers in the format
Cheap commander at 3 mana that can come down and attack quickly
Wide boards play well with sacrifice, convoke, and population themes
Requires combat damage to a player, so she's vulnerable to blockers, removal, and Fog effects
Board wipes erase your entire engine and reset all your invested mana
Doing nothing the turn she connects (her tokens arrive after combat) telegraphs your kill
No built-in evasion beyond trample, so she can be chump-blocked or pillow-forted out