Phyrexian Metamorph The going-rate for a universal Clone is 4 mana, so Phyrexian Metamorph already distinguishes itself by costing 3 mana and 2 life
To activate those cards, we need to hold Don for defensive turns, enough to play the cards we need and protect our Leader
Its easy to go to MTGA or play a pre-release and dont even think about older cards, but sit for a game of Commander, and suddenly half of the cards on the battlefield look like they come from different games
Aether Meltdown, Imprisoned in the Moon, and Unquenchable Thirst look to be inferior to Spontaneous Mutation, although admittedly I havent played with any of the three yet personally
A combination board of Matron with a Lackey in play both gets you any goblin you need and lets you play it for free (provided the Lackey doesn't have summoning sickness)
Nami s Trigger effect lets you activate her On Play effect to KO one of the opponents Characters, possibly ruining the opponents turn