Evilswarm Exciton Knight

Rank 4 LIGHT/Fiend XYZ Monster
1900 ATK / 0 DEF

2 Level 4 monsters
Once per chain, during your Main Phase or your opponent's Battle Phase, if your opponent has more total cards in their hand and field than you do (Quick Effect): You can detach 1 material from this card; destroy all other cards on the field, also your opponent takes no further damage this turn.

Rulings – Yugipedia

Printings:

Legacy of the Valiant: LVAL-EN056 (Secret Rare) - 2014-01-24
2014 Mega-Tin Mega Pack: MP14-EN224 (Secret Rare) - 2014-08-28
Battles of Legend: Light's Revenge: BLLR-EN068 (Ultra Rare) - 2017-07-06
Battles of Legend: Chapter 1: BLC1-EN015 (Ultra Rare) - 2024-02-22
Crossover Breakers: CRBR-EN048 (Rare) - 2024-12-05
Crossover Breakers: CRBR-EN048 (Super Rare) - 2024-12-05
Quarter Century Stampede: RA04-EN212 (Platinum Secret Rare) - 2025-04-10
Quarter Century Stampede: RA04-EN212 (Quarter Century Secret Rare) - 2025-04-10

Prices:

Cardmarket: 0.02 €
TCGplayer: $ 0.13