If you activate Gryff's Boon's last ability and the target creature becomes an illegal target in response, the ability doesn't resolve and Gryff's Boon remains in your graveyard
Every time it deals combat damage to a player, they skip their next untap step, so its a nightmare to deal with
[2] The Commander format has each player provide a 100-card deck, using cards from any printed sets excluding those that are banned, with the requirement that each card outside basic lands must be unique, in contrast to normal Magic decks that allow up to four copies of a card from the game's current base and expansion sets
The fact that this card isn't a supporter card can supercharge your tempo in concert with other items and supporters
This ability also triggers if Accident-Prone Apprentice is in exile
6 Mega Diancie This is a situation where the type works against the Pokmon, but aesthetic overcomes usability