Clutch of the Undercity Four manas a staggering amount for a bounce effect, though hitting any permanent softens the blow
If it has not been cast yet, it is just a card
Ive personally been playing two copies in my sideboard of Blue-Red Murktide and have been loving it, as your opponent generally brings in more removal spells to combat your creatures in post-board games, and a planeswalker like Jace is the perfect foil to that plan
Instead of counting for mana symbols, it simply counts enchantments, still a creature all the way, with a direct reward for casting the requirement for having indestructible and lifelink
Lili fits well into any deck with enough black mana to support her
One of the more important aspects of constructing a deck is the mana ratio