It uses what R&D refers to as the "free mechanic." The idea with it is that if you have enough mana to cast it, it doesn't really cost you anything
When Lilligant uses its Leaf Supply attack, players can take one Grass Energy from their Energy Zone and attach it to a Benched Pokmon
Parts on some cards Strength: Strength appears inside of a sun symbol on the right side of the card and shows how much damage it can deal
Thanks to some combos with undying, you can do a lot with the Father of Machines if you dont mind getting your hands dirty
As well, once Ovinomancer was active, it was nigh-unkillable itself, since returning it to your hand is part of the cost and not effect
Of the cards in this drop, it appears that Liliana of the Dark Realms is the projected value card, though Freyalise, Llanowars Fury is a reasonable second