The final big proliferate-friendly card I'd recommend is Tezzeret the Seeker, which can find your important artifacts more efficiently than the other tutors can, plus it also acts as huge ramp if you've got an Everflowing Chalice or Empowered Autogenerator on the battlefield
Illustrated by Antonio Jos Manzanedo Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
Maybe Im Not Quite Done With This Deck After All There will always be tweaks to make, of course: Spellslinger decks tend to get swamped by big stompy creatures if the draw doesnt go your way, but after somehow packing a Confetti Foil version of Omniscience, if I can ride out potential awkward mid-games, I can start playing cards without their mana cost
Here is a look at some of these fancier cards that I pulled (click on any to view it larger): Definitely pulled some really neat cards, including some packs that had two separate fancy cards
Incubate creates a token with a set number of +1/+1 counters that you can turn into a phyrexian creature for two colourless mana
Renegade Rallier is an efficient three-drop Human that wants you to play with one and two-drops that people want to kill
