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It lets players draw a card equal to the amount of combat damage dealt and is unblockable as long as the defending player controls an island

Matoya, Archon Elder Blue has so many permanents that surveil or scry throughout your turn, like Search for Azcanta, Eyes Everywhere, and Sigiled Starfish, that Matoya, Archon Elder has a ton of card draw potential

Then, when another Dragon enters the battlefield under your control, you can have Sarkhan become a copy of it until the end of the turn

And for good reason

It will still have the ability to transform, but you might need to figure out how it's going to survive first