Goblin Biker Grand Bash

Continuous Spell

"Goblin" monsters you control gain 300 ATK for each "Goblin" monster you control. During your Main Phase, you can Normal Summon 1 "Goblin" monster, in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) You can target 2 "Goblin" monsters you control, then activate 1 of these effects;
● Make the Level of 1 of the monsters become the current Level of the other.
● Both of their Levels become their combined original Levels.
You can only use this effect of "Goblin Biker Grand Bash" once per turn.

Rulings – Yugipedia

Printings:

Phantom Nightmare: PHNI-EN060 (Quarter Century Secret Rare) - 2024-02-08
Phantom Nightmare: PHNI-EN060 (Ultra Rare) - 2024-02-08
2025 Mega-Pack Tin: MP25-EN319 (Common) - 2025-09-04

Prices:

Cardmarket: 0.10 €
TCGplayer: $ 0.20