You don't have to use the Life Essence (hearts) right when you get them. You can merge them for more powerful "Life Orbs"!

Step 1
Drag the Life Essence near other Life Essence:

Step 2
Sit back and relax while they merge.

Step 3
Voila! You now have a Life Orb that can heal as much as 4 hearts!

Step 4
Go crazy and keep merging Life Orbs to get even more powerful Life Orbs!

Step 5
When you're ready, tap the Life Orb to unleash a land-healing bonanza!

How powerful of a Life Orb will you discover?