Caltrops

Description
Throws a single projectile four tiles ahead of you that spawns Caltrops in a plus-shape when it lands. The Caltrops last for 20 seconds, and any enemy that moves onto a Caltrops tile is dealt 30 damage. Caltrops can be layered, such as with. If part of the plus-shape would go off of the grid, the extra tiles are wasted, not layered.

Strategy and Synergy
This spell is unintuitive, but surprisingly powerful. Enemies will take 30 damage any time they move onto a Caltrops tile - including when they're forced onto it with other spells. For instance, if you cast Caltrops, and at any point within the next 20 seconds, you use a spell like on an enemy in the front row, as shown:

...then the enemy will take an additional 90 damage from moving onto Caltrops spaces three times. You can continue to take advantage of this for the full duration of the spell, pushing them onto the tiles with spells like, and then back off with to rack up damage.

Even if you never combine it with other Kinesys spells, Caltrops are also likely to hit mobile enemies a few times over their duration, just by virtue of their moving around a lot. Enemies that persistently try to line up with the player can also be lured into them repeatedly.

Infinite damage can be achieved by covering the entire enemy field in Caltrops while being affected by Fragile. Essentially, enemies will not stop teleporting until dead or the Caltrops expire.