Keen Edge

The first 5 → 10 times you Crit each fight, Charge an item 1 second.

Your rerolls cost 1 / 2 / 3 less Gold.

When you buy a Weapon, gain 10 / 20 / 30 / 40 Max Health.

If you have 5 or fewer items, your items have +10 / 20 / 30 / 40% Crit Chance.

When you use a Friend, your Weapons gain +2 / 4 / 6 Damage and Shield items gain +2 / 4 / 6 Shield for the fight.

Your items have +5 / 10 / 15% Crit Chance if you have 2 or more Medium items.

Your items have +5 → 10% Crit Chance for each Flying item you have.

When your items run out of ammo, Regen 10 / 20 / 30.

When you buy this or Level Up, upgrade a lower tier item.

The first 5 → 10 times you Crit each fight, Charge an item 1 second.

While you have more than half Health, your Weapons have +30 / 60 / 90 Damage.