Clock Tower Prison (DR04-EN228) [Dark Revelation Volume 4]

During each Standby Phase of opponent''s turn, put a [Time Counter] onto this card. When this card have four or more [Time Counter] on it, battle damages would not be done to this card''s controller. When this card is destroy and send to Graveyard while it have 4 or more [Time Counter], special summon a [D-Hero Dreadguy] from your hand or deck.