I think it will settle in junk rare territory
Even if Chun-Li is destroyed in combat, this just gives you another chance for more multikicker usage
In Limited (Draft & Sealed), where you build from random packs, rarity is a rough proxy for power
If the discard was something more universal like lands or blue cards instead of artifacts, or always just one card, while retaining its instant cost it would probably get more play than Fact or Fiction, mostly for occupying a slot on the curve in less demand
Pair this with Pikachu EXs low retreat cost and you have a fast, assassin-style deck
My most successful deck was a Milling/Angels deck, and I won more often than not because I either beat them to death with Baneslayer Angel or milled them to death with Bruvac the Grandiloquent