There are only seven Illusion cards in the deck , and a lot of the remainder, like Treasure Guardian , build on them
If you do, draw a card, then you may put a creature card and/or a land card from your hand onto the battlefield
Core Set 2021 seems to be ramping down the power level a bit since things went nuts in War of the Spark, and then somehow even more nuts in Core Set 2020 and Throne of Eldraine, but well see
Aurora is also strong, enabling you to Quest for two Lore while getting you ready to setup for a shift into Aurora Dreaming Guardian later
Meanwhile Scar (Tempestuous Lion) has a damage of 4 from the outset, but paired with Rush and Challenger (which gives you +3 attack when challenging) makes him an absolute beast at 7 damage