The only downside is that you need to keep a creature alive in addition to the Enchantment in order to maintain that banishment, but Sheltered by Ghosts more than makes up for this by giving the creature in question Ward 2, for a total package that does more than other cards for less mana
Sets that primarily take place there : Kaladesh and Aether Revolt Planeswalker natives (with planeswalker cards) : Chandra, Dovin, and Saheeli Kaladesh is Chandra's homeworld and our take on steampunk combined with an inspiration from India
You get an Emrakul onto the board, but have to wait a turn to attack
ISD is iconic for a reason, and thats not just because people love to play its draft format
In Commander, that shuts off a shocking number of decks
Unfortunately kicker doesn't play well with Zombie Tribal's main strengths, which is cheating them into play from the graveyard (Zombie Apocalypse) or casting them for free with Rooftop Storm