See rule 702.84, Unearth. 702.84a: Unearth is an activated ability that functions while the card with unearth is in a graveyard
This happens because first we define the total cost of activation, and then pay it in full
Then there will also be cards in the graveyard for Imperial Recovery Unit to regrow
Fiery and straight to the point, if you want to play fast and forceful, ruby should be where you start looking
This set, released in 2020, includes a wide range of cards from past sets, including rare and hard-to-find cards
2: Create a blue Dog Illusion creature token with "This token's power and toughness are each equal to twice the number of cards in your hand." 10: Exchange your hand and library, then shuffle