Venat, Heart of Hydaelyn // Hydaelyn, the Mothercrystal

Whenever you cast a legendary spell, draw a card. This ability triggers only once each turn.
Hero's Sundering — , : Exile target nonland permanent. Transform Venat. Activate only as a sorcery.

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Indestructible
Blessing of Light — At the beginning of combat on your turn, put a +1/+1 counter on another target creature you control. Until your next turn, it gains indestructible. If that creature is legendary, draw a card.