Probe

The Probe is a unique flying and burrowing enemy that is sent out from The Destroyer as it takes damage. Probes shoot lasers which do moderate damage, though they do not pass through solid blocks. Most notably, Probes have a 100% chance to drop a Heart upon death. For this reason, killing Probes while fighting The Destroyer is an excellent source of healing.

The red orbs on The Destroyer's body are actually Probes. When one of the red orbs takes enough damage, the Probe will detach from The Destroyer. After all the orbs are gone, no more Probes can spawn. This means that The Destroyer cannot shoot lasers once all of the Probes have been defeated. Note that Probes are not immune to status effects.

Update Info
1.1 - Added to the game.