mtg slug cards Amazon.com: Magic: the Gathering - Spitting put a slime counter on each creature you dont control Angelarium Tokens Tagged "Slug" -

The really fun part though is that whenever a spider gets a killing blow on another creature (on your turn), you get to make a grisly food token copy of that creature

This means that to include a Dual-Ink card in your deck, your deck must contain both of the Ink types displayed on the card

It only works once each turn, so you'll want to stack a large number of counters at once, or find ways to put counters on creatures during opponents' turns to trigger multiple times per turn cycle

Build up a strong enough board presence, or get your opponent low enough with chip damage, and you can create a game state where your opponent can't even kill your creatures without risking death themselves