Its one card among 99
The Saga mechanic from the upcoming set Dominaria seems like a great mechanic, but creates a new visual layout for the card the text box is over the card type, for example while it makes it more unique it also adds cognitive noise
Ardent Dustspeaker Bsium Strip Caller of the Claw Chandra, Heart of Fire Charmed Pendant Circling Vultures Dralnu, Lich Lord Gandalf of the Secret Fire Glacierwood Siege Izzet Chronarch Kumano's Blessing Magmatic Channeler Memory Plunder Mirror Golem Muck Drubb Mystical Teachings Necromancy Nucklavee Patron of the Nezumi Repopulate Scrivener Sins of the Past Spellweaver Volute Stonecloaker Tablet of Discovery Teroh's Vanguard Thor, God of Thunder Toshiro Umezawa Twilight's Call Unearth
Cards like Howling Mine, Font of Mythos , Temple Bell , and Horn of Greed allow both you and your opponents to draw at least one extra card each turn or when that player plays a land
It's not flashy (at least until Chemists get to wield guns), but it's darn reliable
So all you have to do with Karumonix is build a fairly straightforward Phyrexian Rat deck, find a few ways to get them to slip through some combat damage, and start watching those poison counters tick up