They only become better and better when you have multiple lands that are worth searching out from the 99
If you don't have the spells to cast, she's just a 2/4 for three mana
There are only really a handful of exile board wipes, and many of them are quite expensive so you either go drastic to get rid of Avacyn, or she stays until the game is finished
How to get the most money for your bulk Pokmon cards Do you have a bulk of Pokmon cards that you need to get rid of
Ultimately, I created a Feldon of the Third Path deck, as I am often wont to do, and jammed the list full of Ball Lightning and Ball Lightning-adjacent cards, like Blistering Firecat, Hells Thunder, Arc Runner, Vexing Devil, Cosmic Larva, Stingscourger, Lightning Serpent, Crater Elemental, Archetype of Aggression, Phyrexian Soulgorger, Tuktuk the Explorer, Keldon Marauders, Burnished Hart, Hellspark Elemental, and Heartlash Cinder
Added AT-ST