As a sorcery, meaning during your main phase if the stack is empty, you can activate the level 2 ability
As long as you combine this with some good landfall triggers, or just a land-heavy deck, you can overwhelm anyone by just playing a few more land cards
If you have fewer than four creature cards in your graveyard at that point, the ability wont have any effect.
I we pick a creature, then of course we can bring it back via [[Kotis, Sibsig Champion]]
Venusaur ex has the ability to heal any Pokmon on the board for 60 HP , which is great into decks like Dragapult ex because those decks like to place damage on the bench
Jeskas Will quickly rose to popularity after being featured on an episode of Game Knights