Rhexo, the Eternal

Flying, deathtouch
When you cast Rhexo, the Eternal, search your
library for up to 3 dragon creature cards,
reveal them, and put them into your graveyard,
then shuffle your library.
Threshold- At the beginning of your upkeep, return target dragon creature card from your graveyard
to the battlefield. Activate this ability only if you
have 7 or more cards in your graveyard.