This is my favorite among the ten three-color groups, because Esper's mechanical identity includes a lot of the things I love doing in Magic , regardless of the format: control, reanimator, card draw, and even more aggressive token builds
This is a risky card to run, but remember that life is a resource, and Staff of Compleation allows you to spend it for some very useful effects
As for the auras themselves there are quite a few
Wizards of the Coast and Square Enix have knocked it out of the park with this Universes Beyond crossover and Ive been completely caught, tangled up, in its web
Wojek Investigator offers up nice benefits, assuming the green player at the table is ramping their lands
Call The Spirit Dragons Call the Spirit Dragons does quite a bit for any Dragon deck