Once you have flipped Arlinn over, the -1 to Lightning Bolt a creature or player is amazingly good as well
Malicious Affliction Doom Blade is strong, but not as strong as two Doom Blades
Battle-Persistent Princess AUTOONCE PER TURNSend 1 card from your hand to the Retreat Area When another ally Class Changes, you may pay the cost and if you do: Choose 1 Lucina from your Retreat Area, and add it to your hand
Blitzwing, Cruel Tormentor / Blitzwing, Adaptive Assailant With Blitzwing, Cruel Tormentor, you punish players at the end step for the life they lost this turn
In a regular Commander game, once you have the aura on her, each three mana spell you cast draws you three cards and makes every opponent discard one
The idea is simple: survive the early turns, build up your setup, then start swinging for massive damage