Elemental HERO Honest Neos

Level 7 LIGHT/Warrior Effect
2500 ATK / 2000 DEF

(Quick Effect): You can discard this card, then target 1 "HERO" monster on the field; it gains 2500 ATK until the end of this turn. (Quick Effect): You can discard 1 "HERO" monster; this card gains ATK equal to the discarded monster's ATK until the end of this turn. You can only use each effect of "Elemental HERO Honest Neos" once per turn.

Rulings – Yugipedia

Printings:

Duelist Saga: DUSA-EN028 (Ultra Rare) - 2017-03-30
Battles of Legend: Relentless Revenge: BLRR-EN079 (Secret Rare) - 2018-06-28
Legendary Duelists: Magical Hero: LED6-EN019 (Super Rare) - 2020-01-16
Legendary Duelists: Season 3: LDS3-EN102 (Ultra Rare) - 2022-07-21
Battles of Legend: Chapter 1: BLC1-EN120 (Common) - 2024-02-22

Prices:

Cardmarket: 0.15 €
TCGplayer: $ 0.26