theinen the great sphinx yugioh card - Unlimited Ultra Rare - EP1-EN001 Age Group Two Yugioh Theinen the Great

When Welder released in 2019's Unbroken Bonds set, it quickly became one of the most important cards during the Sun and Moon era of the Pokmon TCG

Its rarity in this form drives strong interest despite being a common effect

A PSA 10 (Gem Mint) card can sell for dramatically more than the same card in played condition

Yes, the discard 3 might be a drawback to offset the ridiculous advantage you get, but under most circumstances you can dodge that by, after a Special Summon spree, having this card banish itself during the End Phase to draw 1 last card, or purposely ramming itself into a stronger monster the opponent controls to get another card