mtg ikoria commander deck Decks Magic the Gathering: Commander 2020

Each booster contains twelve randomized cards

Where she really shines is in her ability, which says that whenever she attacks, her controller may put an Angel, Demon, or Dragon creature card from their hand directly onto the battlefield, tapped and attacking the same opponent Kaalia was attacking

If the chosen permanent is copying something else (for example, if the chosen permanent is a Clone), then your Malleable Impostor enters the battlefield as whatever the chosen permanent copied, with the stated exceptions

So this HeiHei has a steep hill to climb to playability

I took advantage of this and bought several dual lands for cheap from him at once (plus it is hilarious to tap Volcanic Island to cast Augury Owl or Lightning Berserker and watch peoples reactions)

You can also abuse the crap out of its ability in your colors