You have 2 » 4 » 6 Regeneration for each Ammo item you have.

When you Level Up, upgrade a Bronze » Silver-tier item.

When you use a Weapon, it gains +2% » +4% » +6% » +8% Crit Chance for the fight.

The first 5 » 10 times you Crit each fight, Charge 1 item(s) 1 second(s).

While you have more than half Health, your Weapons have +25 » +50 Damage.

At the start of each fight, deal Damage equal to 15% » 30% of the enemy's Max Health.

Your leftmost Ammo item has +1 » +2 » +3 » +4 Max Ammo.

When you use a non-Weapon item, Burn 1 » 2 » 3 and Poison 1 » 2 » 3.

When you win a fight against a player, gain 2 » 3 » 4 » 5 gold.

When you buy a Weapon, permanently gain 20 » 30 » 40 » 50 Max Health.

Your items have +2% » +3% Crit Chance for each Weapon you have.

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

When any non-Weapon item is used, Slow it for 2 » 4 second(s).

Your Shield items have +1 Shield. When you sell a small item, increase this bonus by +1 » +2 Shield.

Your Weapons have +1 Damage. When you sell a small item, increase this bonus by +1 » +2 Damage.

When you visit a Merchant, permanently gain 25 » 50 » 75 Max Health.

The first time you fall below half health each fight, Shield equal to 20% » 30% of your Max Health.

Your Weapons have +2 » +4 » +6 Damage and Shield items have +2 » +4 » +6 Shield for each Friend you have.

Reduce the cooldown of your Aquatic items by 10% » 20%.

When you use a Friend, your Weapons gain 3 » 6 Damage for the fight.