Gamathron, Thag-Soarer

Flying, Defender
When Gamathron, Thag-Soarer enters the battlefield, if you cast it, return all other non-land permanents to their owner's hand and tap all
lands. Gamathron, Thag-Soarer doesn't untap
during your untap step.
{t}: Put a permanent card from your hand
onto the battlefield.
Thag's only known native Planeswalker, she swims between it and the Jade Moon, watching for
invaders.