I thought of a new bomb, the Deletor (can't think of a better name).

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Alchemy path:

2*: Deletor
3*: Super Deletor/Unemployer
4*: Obliterator/Extreme Unemployer
5*: C.E.F./Workplace Annihilator/Ultrafirer

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2* Deletor: Creates a ring around the edge of the explosion radius which lasts for a few seconds before exploding. The ring slows down any enemies touching it (similarly to stun, except they'll immediately be full speed again when leaving the ring), but they won't be effected when inside the ring. They also won't be able to dodge/dash/burrow, but Mecha Knights can still shield. The actual explosion deals little damage, but reduces the enemy defense by 30% for a few seconds. Defense decrease lasts for 3 seconds. Has a red explosion with an X. (Description: ____)

3* Super Deletor: Has larger range. Decreases defense by 40%. Defense decrease lasts for 4 seconds. Has a dark red explosion with an X. (Description: ____)

3* Unemployer: Same range as the SD, but less damage. Decreases defense by 35% (except fiends - decreases their defense by 45%). Deals high bonus damage to fiends. Defense decrease lasts for 4 seconds. Has a dark blue explosion with a fiend symbol. (Description: ____)

4* Obliterator: Has larger range. Decreases defense by 55%. Defense decrease lasts for 5 seconds. Has a dark red explosion with an X. (Description: ____)

4* Extreme Unemployer: Same range as the Obliterator, but less damage. Decreases defense by 50%. (except fiends - decreases their defense by 60%) Deals high bonus damage to fiends. Defense decrease lasts for 5 seconds. Has a dark blue explosion with a fiend symbol. Papers/books can be seen flying out of the blast. (Description: ____)

5* C.E.F.: Has larger range. Decreases defense by 65%. Defense decrease lasts for 6 seconds. Has a blue explosion with an X (darker than most bombs, but not as dark as the Unemployer. (Description: Error, your enemies have encountered a Critical Existence Failure. Please try again later.)

5* Workplace Annihilator: Same range as the C.E.F., but less damage. Decreases defense by 60%. (except fiends - decreases their defense by 70%) Deals high bonus damage to fiends. Defense decrease lasts for 6 seconds. Has a dark blue explosion with a fiend symbol. Papers/books and desk pieces can be seen flying out of the blast. (Description: Almost all creatures who have seen this bomb no longer have a job, or a life.)

5* Ultrafirer: Same range as the WA, but even less damage than that. Decreases defense by 55%. (except fiends - decreases their defense by 65%) Deals high bonus damage to fiends. Has a good chance to inflict moderate fire. Defense decrease lasts for 6 seconds. Has a dark purple explosion with a fiend symbol. Flaming papers/books can be seen flying out of the blast. (Description: ____)

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I'll make images later. Let me know about your thoughts on this and how I could improve it.

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Edit 1: Made Unemployers decrease fiend's defense by 5% more instead of 5% less (still 5% less for other monsters). Also updated formatting a bit and added this section.

Edit 2: Slightly changed the C.E.F.'s description. Made the Ultrafirer inflict moderate fire instead of minor fire.

Edit 3: Reduced defense decrease power, added debuff time.