Mana-Fixing Artifacts Cultivate, Farskeek, and both Manaweft and Gemhide Slivers help with Sliver Swarm's mana problems, but they're all contingent on drawing a green source of mana in your opening hand
A textured foil costume change card appears in less than 1% of Collector Boosters in this slot
But there are ways to put cards from your library in your graveyard, like with mill or entomb effects
It does so little for 3 mana that I cant find myself ever wanting to play this, even if spirits were the most commonly played creature type in all formats
Tergrid attacks your opponents in the untraditional sense, focusing on cutting off their resources before they can use any of them
(To mill a card, a player puts the top card of their library into their graveyard.) 7.0/10$0.23 Atrocious Experiment Sorcery Target player mills two cards, draws two cards, and loses 2 life