You can recycle strong ETB effects like the ones on Gray Merchant of Asphodel and Solemn Simulacrum, or punish your opponents for not giving you your creatures back
Since Mairsil is Grixis, that cuts out a fair number of blink spells that are white, but we can still make use of a few like Conjurers Closet and Illusionists Stratagem
The set included Wrath of God as Shrinking Storm, Dance of Many as Dance Battle Etherium Sculptor as Supply Llama, Grim Tutor as Crack the Vault, Triumph of the Hordes as Battle Royale, Smugglers Copter as Battle Bus, and Planar Bridge as The Cube
This lets you capture and appreciate the feast before it's gone
The game is really stingy about giving energy cards out for some reason
As much as I'd love to see FFXI Cid and his horrifying mouth (FFXI Cid isn't real, he can't hurt you), I'd expect more to see the Cids from IV, VII, and maybe XII