Fae of Wishes A key part of stuff to do with your almost infinite mana in Omnath, Locus of Creation decks when that was legal in Standard for a microsecond, Fae of Wishes sees the most play these days as a flexible part of Rona, Herald of Invasion combo decks in Pioneer
Robots are great for collectors and those who like to make creative decks with their friends
Urza's Saga Island, by Donato Giancola I know
That is, unless your opponent is playing a Darkness deck (Psychics weakness), or Charizard ex, who is capable of knocking out Pokemon ex with a single attack when fully built
The same is true for creature spells you control and creature cards you own that aren't on the battlefield
I think it may depend a great deal on whether your deck wants a big five-mana flying creature