Play it turn 1, swing in on turn 2, then put Muxus, Goblin Grandee into play and get another five goblins to boot
Lots of Magic cards have nicknames Solemn Simulacrum is known as Sad Robot, Gray Merchant of Asphodel is Gary, Sakura-Tribe Elder is Steve, and Prodigal Sorcerer has long been known as Tim named after the very same Tim from Monty Python and the Holy Grail thats included in this printing
Full Art Trainer and Energy Cards: Modern cards with extended artwork are increasingly popular
You can call it canon at any time because thats what the multiverse implies, but at the same time those promotional cards were just card styles and not actual standalone cards like the Street Fighter or Walking Dead Secret Lairs
Still, I like this Liliana as a nice, grindy planeswalker