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If another effect sets a creature's power to a specific number or value, that becomes its base power

If Magic Online can support a plethora of formats with (comparatively) a handful of players, it's hard to believe that Magic Arena couldn't support at least a couple of more evergreen constructed formats without the entire system falling apart due to long waits and poor matchmaking

Bernama-Kyodo

It has a lot of top end (four 6+-drops not including the backside of Mila, Crafty Companion), lots of card advantage, and several splashes that heavily lean on the seven learn cards plus Environmental Sciences to tie together

So if you need a full party or have outlaw payoffs, a changeling counts for either one