Thran Moordrainer

Swampwalk
{c}: Thran Moordrainer is a Myr with "{t}: Add {b} to your mana pool." in addition to its other types until end of turn.
{p/b}, {t}: Put a dry counter on target Swamp. It is a Wastes as long it has a dry counter on it.
It is said that relics of these once became the blueprint of the modern day Myr.