With one in play already, you can easily reduce the cost of your spells by four
Decklist: Rakdos Madness in Pauper Kitchen Imp | Illustration by Evyn Fong Creature (12) Kitchen Imp x4 Sneaky Snacker x4 Voldaren Epicure x4 Enchantment (4) Instant (8) Fiery Temper x4 Lightning Bolt x4 Sorcery (20) Alms of the Vein x4 Bump in the Night x4 Chain Lightning x4 Faithless Looting x4 Grab the Prize x4 Land (16) Mountain x10 Rakdos Carnarium x2 Swamp x4 Sideboard (15) Crush x2 Distemper of the Blood x2 Dual Shot x2 Duress x3 Fodder Tosser Shatter x3 Shock x2 The curve on this Rakdos Madness list is a little nutty with just 16 land and three different creatures in Kitchen Imp, Voldaren Epicure, and Sneaky Snacker
Also, with escalate, each additional mode has the same cost (for example, Collective Effort requires you to tap a creature for each additional mode)
The discard option is the most likely one for you to break by having no cards in hand, but so can your opponents
Sproling Migration
The restriction to artifacts isnt too bad since many artifacts pick up counters worth proliferatingfor example, anything with modular, Astral Cornucopia, and Everflowing Chalice