The final tweak, was to create an instant that had a fluid customizability: This card is interesting because it encourages a player to build a deck with either a variety of creature types or with creatures that can change their creature type (see Mistforms above)
Whats your favorite Dimir creature
This cost reduction even gets around Commander Tax, so if you need to recast her you can just gain some life and cast her again
These rankings are based on simplicity, how well they demonstrate the core of the game, and their upgradeability
Impeccable Timing This white removal spell is a reprint for a good reason
Ugin, Eye of the Storms A planeswalker that comes into play and immediately gains you 3 life, draws you a card, and exiles a relevant threat