Hardened Armed Dragon

Level 4 EARTH/Dragon Effect Monster
1500 ATK / 800 DEF

(This card is not treated as an "Armed Dragon" card.)
You can Special Summon this card (from your hand) by sending 1 Level 8 or higher monster from your hand to the Graveyard. If you Tribute this card for the Tribute Summon of a Level 7 or higher monster, that monster cannot be destroyed by card effects.

Rulings – Yugipedia

Printings:

Raging Battle: RGBT-EN083 (Secret Rare) - 2009-05-12
Battle Pack: Epic Dawn: BP01-EN214 (Common) - 2012-05-24
Battle Pack: Epic Dawn: BP01-EN214 (Starfoil Rare) - 2012-05-24
Machine Reactor Structure Deck: SR03-EN018 (Common) - 2017-04-13
Egyptian God Deck: Obelisk the Tormentor: EGO1-EN010 (Common) - 2021-06-17

Prices:

Cardmarket: 0.13 €
TCGplayer: $ 0.01