For Auras, I count 22 aura cards, not including Eidolon of Countless Battles which can be cast as an aura and Scriv, the Obligator which creates aura tokens
Also from Fallout is Kellogg, Dangerous MindKellogg, Dangerous Mind
Lier, Disciple of the Drowned gives you extra turn spells get flashback, so every extra turn is actually two
While Jumpstart pushed Historic Goblins too far with the addition of Muxus, Goblin Grandee, Modern Goblins have been a blast
In something like a Vespiquen deck that interacts with the discard pile Unown is even stronger, because it discards itself for free
It can be compared to Heritage Druid that currently stands at $10 a piece, but it is not legal in standard, historic, or even pioneer, which provides space for Circle of Dreams Druid