
Creatures can't attack you or planeswalkers you control unless their controller pays {X} for each of those creatures, where X is the number of enchantments you control.
Sphere of Safety has 9 printings, first in Return to Ravnica (2012). EDHREC ranks it #693 among Commander cards. It appears most in Aminatou, Veil Piercer decks (13,369 on EDHREC). 2 public decks on TCG run it. It has 1 official ruling.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.