You will complete this mission once you have the colorful-bordered Special Illustration of the following cards: Zapdos, Articuno, and Moltres
So far, the only real information we have is that we'll get one every pack, all of them will be foil and about half of the tokens will be tied to cards in Unstable
Aesis draw trigger is a may ability, so if you establish an infinite loop, you wont mill yourself the way you would with Tatyova
You will need to learn some of its secrets before setting foot inside
Virtual World Kirin - Lili is another monster with 600 DEF that has a similar summoning condition, but it mills that third type of Virtual World card instead
Overmaster is the best, followed by some haste enablers, then a bunch of effects that you might not care about other than the draw effect ( glances significantly over at Warlord's Fury )