Castle of Dragon Souls

Continuous Trap Card

Once per turn: You can banish 1 Dragon monster from your GY, then target 1 monster you control; it gains 700 ATK until the end of this turn (even if this card leaves the field). When this face-up card on the field is sent to the GY: You can target 1 of your banished Dragon monsters; Special Summon that target. You can only control 1 "Castle of Dragon Souls".

Rulings – Yugipedia

Printings:

Saga of Blue-Eyes White Dragon Structure Deck: SDBE-EN033 (Common) - 2013-09-12
Duelist Pack: Rivals of the Pharaoh: DPRP-EN031 (Rare) - 2016-09-15
Legendary Collection Kaiba Mega Pack: LCKC-EN051 (Ultra Rare) - 2018-03-08

Prices:

Cardmarket: 0.06 €
TCGplayer: $ 0.07