Zellion, Homesick

Defender

Whenever a legendary creature you control deals combat damage to a player, draw that many cards.

{1}, Discard a card: Zellion, Homesick loses defender and gains +1/+1 until end of turn.

Sigzil is able to mitigate the Dawnshard's torment using a sunheart he took from Canticle, allowing him to fight as normal by pushing some of the unwanted Investiture into it.

based on Glint-Eye Nephilim