Paper Phrog

Paper Phrog is an uncommon relic that increases the damage bonus from Vulnerable from 50% to 75%. Normally, Vulnerable causes enemies to take 50% more damage from attacks; with Paper Phrog, they take 75% more. This makes Vulnerable a dramatically more powerful offensive amplifier.

Paper Phrog transforms Vulnerable from a useful debuff into a near-mandatory buff. Any build that can reliably apply Vulnerable — through cards like Bash, Uppercut, Body Slam, or potions — benefits enormously from the 25% increased multiplier. Bag of Marbles (which applies Vulnerable to all enemies at combat start) becomes even better with Paper Phrog since every combat begins with a 75% damage amplifier on all targets. Champion Belt (which adds extra Vulnerable stacks) compounds with this. Paper Phrog is one of the strongest uncommon relics in the game for attack-heavy builds.