Adventure cards are treated as if they are only the creature half at all times except when they are on the stack being cast as the adventure.
For a long time no one knew quite how to deal with Illusionary Mask
Combine this with green card draw effects (which are plentiful these days), and you've got a card advantage machine that will put you in pole position, especially in a Commander pod
Fairy was its own type for two eras of the card game, X & Y and Sun & Moon, before being removed with the start of Sword & Shield
One of those was the 1998 Game Boy Color Pokmon Trading Card Game
Trostani, Selesnya's Voice populates tokens to gain you life, and Huatli, the Sun's Heart allows your high-toughness creatures to change how they deal damage