Clock Tower Prison

Field Spell

Once per turn, during your opponent's Standby Phase: Place 1 Clock Counter on this card. While there are 4 or more Clock Counters on this card, you do not take any battle damage. If this card with 4 or more Clock Counters is destroyed and sent to the GY: Special Summon 1 "Destiny HERO - Dreadmaster" from your hand or Deck.

Rulings – Yugipedia

Printings:

Enemy of Justice: EOJ-EN048 (Super Rare) - 2006-05-17
Enemy of Justice: EOJ-EN048 (Ultimate Rare) - 2006-05-17
Duelist Pack: Aster Phoenix: DP05-EN016 (Rare) - 2007-02-07
Dark Revelation Volume 4: DR04-EN228 (Rare) - 2007-11-14
Legendary Collection 2: The Duel Academy Years Mega Pack: LCGX-EN141 (Common) - 2011-10-04
Legendary Hero Decks: LEHD-ENA19 (Common) - 2018-10-04

Prices:

Cardmarket: 0.18 €
TCGplayer: $ 0.16