Magic Portals was a game by NetEnt that was released back in 2012.
It used a magicians theme with all sorts of magic orbs, wizards and more. And the game revolved around wild symbols.
On reels 1 and 5 there is a magic portal surrounding the middle symbol. When two of the same symbols land on these portals, all those symbols will turn wild, making a very big win nearby.
Get the free spins symbols in the magic portals and you are awarded 10 free spins with 2 extra portals on reel 5.
Free spins could also retrigger.
Magic Portals was discontinued in 2020 due to a lack of interest from players.
A bit of shame, because it was a fun game with a feature I haven’t seen like this before or after.