Grass Leaf is a Legends of Idleon item: dropped by 7 monsters, used in 2 recipes, quest reward.

Grass Leaf | Idleon Toolbox

Grass_Leaf

Bleach_Logs

Amarok_Paws

Hold down to gain EXP in the skill that's displayed in the corner of your screen. If you're in a town, you will gain EXP in the town skill. The amount of EXP you get is based on your skill's Lv.

Small_Experience_Balloon

Increases your Max Health by 30%. Golden foods are never consumed.

Golden_Jam

Increases Move Spd by 15%. 1% chance to be consumed every 10 meters walked. Must be equipped in a Food Slot to give its bonus.

Average_Speed_Potion

Twisty_Leaf

Increases Forging Speed by 10% for the Forge Slot it's in. 30% chance to be consumed when a bar is forged.

Eco_Friendly_Oil

Auto-Used when your health goes below 75%. Restores 80 HP. Has a 20 second Cooldown. The favorite snack of all bloblytes!

Peanut

Hold down to add these gems to your account. You can then spend them in the Gem Shop!

Battleaxe_Stamp

Hold down to instantly get 1 Hour of AFK Gains.

Name	Qty	Rate	Chance
Crystal Carrot	5	1 in 4	25.0%
Toilet Tree	5	1 in 189	0.530%
Stump Tree	5	1 in 196	0.510%
Forest Tree	5	1 in 211	0.475%
Jungle Tree	5	1 in 222	0.450%
Birch Tree	5	1 in 235	0.425%
Oak Tree	5	1 in 250	0.400%

Wiki

Grass Leaf

Dropped by

Used in crafting

Required by quest

Used in upgrades