Diseased Vermin

Creature - Rat 1/1, 2B (3)
Whenever Diseased Vermin deals combat damage to a player, put an infection counter on it.
At the beginning of your upkeep, Diseased Vermin deals X damage to target opponent previously dealt damage by it, where X is the number of infection counters on it.¹
Illus. Scott Kirschner

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/6)	Alliances (Uncommon)