1st gen yugioh cards Orica Introduces the Mainspring and Bugman archetypes. Beckett: Online Sports & Non

This combination of demand and rarity makes Mana Crypt the 4th-most-valuable card outside the Reserved List, behind two cards from Portal: Three Kingdoms (Imperial Seal and Zodiac Dragon) and one (Grim Tutor) which was exclusive to a particular 1999 starter deck

Not everyone is going to have six creatures on the battlefield, so this is a battlefield sweeper in many cases

this one's a bit much for practical play

You can untap it by putting a -1/-1 counter on it, so pair it with something that offsets the counters or turns it into a non-creature, and youve got infinite green mana

Balthier and Fran A powerful attacker, and lord for vehicles, Balthier and Fran let your vehicles keep going and pounding your opponents