Note that this works for when any creature attacks, not just yours, so when someone attacks you and triggers a defensive card you also net the trigger twice, so you could play this in a Pillow Fort deck build around things like Cunning Rhetoric and Search the Premises
cant activate it without delaying drawing Warden till turn 5 (might as well Blackmail Kolaghans Command actually) My turn 3: Make Warden a warrior, attack with 3/3 (12 life) Opponent turn 4: Cast, and make Warden a 3/3, dont attack My turn 4: Make Warden a lifelinking spirit, dont attack Opponent turn 5: make Warden a lifelinking spirit, attack (15 life) My turn 5: Make an 8/8 Actually, wait, 15 life is less than 19 life
Its a little on the expensive side, but youre paid off by having this ramp you to something bigger
Chief: Im gonna have to go with Aurelia, the Warleader because of that awesome new Ravnica showcase design