In this case, does adding 1 card to my Life cards according to this [Trigger] occur before processing the second damage of the [Double Attack]
Thankfully that unblocked attacker could be a harmless 0/1 flier, but the capability not far off, and at worst you get a Diabolic Tutor
This thing could be massive in control decks, and its sure to be a target for plenty of removal spells the moment its played
Instead of relying on that perfect draw from the top of your deck, tutors allow you to trade that card in your hand for the opportunity to search your library and pull another card, usually into your hand, but sometimes to the top of your library
Like stealing effects, copy effects have also been going up in rarity over time
This is an incredibly versatile ability