The Illumineer has to open their three boosters packs and with those 36 cards try and acquire the specific 6 cards on their Quest Sheet
White gets much more defensive and begins doing things to slow down the game
Three-mana planeswalkers have traditionally been powerhouses in Standard, but its hard to tell if Saheeli will be as well
Upgrades If youre looking to spend a little extra to make that deck that much better, there are quite a few upgrades you could pick up, and instead of just giving three cards, Im going to give you three sets of upgrades: one set which Id suggest for either commander, one for Averna, and one for Maelstrom Wanderer
As for going wide, Regal Caracal from the Amonkhet block is a fine start, a 3/3 that gives all friendly Cats +1/+1 and lifelink, making damage races easy
Flare of Fortitude lets you sacrifice a nontoken white creature instead of paying its cost, and in return, it gives all your permanents hexproof and indestructible until end of turn, while also locking your life total
