Despite how long defender has been around, there aren't a ton of cards with defender in the game compared to other mechanics of its age, largely due to the pool of defenders being kept purposefully small as, by their nature, they have much less use than other mechanics outside of Limited formats
There have been and still are reanimation builds in Modern and Legacy that revolve around cheating Griselbrand into play and drawing cards until you hit a win condition
New Series, New Staples Style your deck with stamped, cosmos foil versions of Pok Pad and Dawn, which have proven integral to decks featuring Evolution Pokmon
Are Enchantments Considered Abilities
Effects that modify a creature's power and/or toughness, such as the effect of the ability granted by Idolized, will apply to the creature no matter when they started to take effect