Mythical Beast Cerberus

Level 4 LIGHT/Spellcaster Effect
1400 ATK / 1400 DEF

Each time a Spell Card is activated, place 1 Spell Counter on this card when that Spell resolves. Gains 500 ATK for each Spell Counter on it. At the end of the Battle Phase, if this card battled, remove all Spell Counters on it.

Rulings – Yugipedia

Printings:

Structure Deck: Spellcaster's Judgment: SD6-EN002 (Common) - 2006-01-18
Spellcaster's Command Structure Deck: SDSC-EN015 (Common) - 2009-03-31
Battle Pack 2: War of the Giants: BP02-EN042 (Common) - 2013-06-28
Battle Pack 2: War of the Giants: BP02-EN042 (Mosaic Rare) - 2013-06-28
Battle Pack 3: Monster League: BP03-EN018 (Common) - 2014-07-31
Battle Pack 3: Monster League: BP03-EN018 (Shatterfoil Rare) - 2014-07-31
Structure Deck: Order of the Spellcasters: SR08-EN008 (Common) - 2019-04-19

Prices:

Cardmarket: 0.05 €
TCGplayer: $ 0.05