I don't see the trigger as hugely relevant, yet I'm super happy when I get to use it on Tyrant of Discord or Muldrotha, the Gravetide
Gandalf, Friend of the Shire Gandalf, Friend of the Shire gives you the flexibility to cast sorcery spells at instant speed, which can be a good advantage
Its especially powerful against a player whos looking to play a small numbers of strong creatures as opposed to going wide
In the meantime, also check out some of the upcoming Starter Decks with Madrigal Magic featuring Encanto and Stand Together with Hercules!
Back when people played for ante (and in current 5-Color Magic ), this card alone would win game after game after game
Depending on the Creatures mana cost, this might be a bit difficult and inefficient