Darksteel Colossus Rarity: Mythic Rare TYPE: Artifact Creature SUBTYPE: Golem CMC: 11 Mana cost: USD: $0.66 EUR: 1.12 TIX: 0.02 EDHREC RANK: 2563 (11/11) Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) Indestructible (Damage and effects that say "destroy" don't destroy this creature.) If Darksteel Colossus would be put into a graveyard from anywhere, reveal Darksteel Colossus and shuffle it into its owner's library instead
Used copies average around $650, but this can rise pretty rapidly even with a bad PSA grade - so providing its still in one piece, it's definitely worth getting the card graded.
This system can be tuned to trading cards, coins, furniture & home decor, arts, and real estate, there are infinite use cases
In other TCG-related news, check out the Mewtwo VSTAR card from VSTAR Universe [S12a]
Or you can rattle off cheap spells for a flurry of cascades each turn