Mudragon of the Swamp

Level 4 WATER/Wyrm Fusion Effect
1900 ATK / 1600 DEF

2 monsters with the same Attribute but different Types
Your opponent cannot target this card, or monsters on the field with the same Attribute as this card, with card effects. Once per turn (Quick Effect): You can declare 1 Attribute; this card becomes that Attribute until the end of this turn.

Rulings – Yugipedia

Printings:

2018 Mega-Tins: CT15-EN005 (Ultra Rare) - 2018-08-30
Toon Chaos: TOCH-EN049 (Rare) - 2020-06-18
OTS Tournament Pack 21: OP21-EN016 (Common) - 2023-02-09
25th Anniversary Rarity Collection: RA01-EN028 (Super Rare) - 2023-11-02
25th Anniversary Rarity Collection: RA01-EN028 (Ultra Rare) - 2023-11-02

Prices:

Cardmarket: 0.17 €
TCGplayer: $ 0.21