He put together a greedy but powerful four-color deck
Arcanist's Owl Aven Mimeomancer Aven Wind Guide Cat-Owl Empyrean Eagle Esper Cormorants Gwaihir the Windlord Ishai, Ojutai Dragonspeaker Ishai, Ojutai Dragonspeaker Judge's Familiar Kangee, Aerie Keeper Kangee, Sky Warden Kastral, the Windcrested Kykar, Zephyr Awakener Plumecreed Mentor Sawtooth Loon Seedpod Squire Shabraz, the Skyshark Skymark Roc Swans of Bryn Argoll Talon Trooper Vega, the Watcher Watcher of the Spheres Yorion, Sky Nomad
Have the menacing and hasty Two-Headed Hellkite attack its way to your opponent for your card draw engine
Even more impressive, she gives all your creatures with +1/+1 counters trample, making her a perfect leader for decks focused on counter synergies
Create Spirits when cards leave your graveyard, then pile on typal Spirit bonuses and buffs to bury your opponents six feet deep

Doomsday: Out: 1x Shattering Spree, 1x Damping Sphere, 2x Fable of the Mirror-Breaker In: 2x Grafdiggers Cage, 2x Unlicensed Hearse Bazaar Decks: Out: 3x Maddening Hex, 1x Trinisphere, 1x Shattering Spree, 3x Damping Sphere, 1x Chalice of the Void, 1x Pyroblast In: 2x Alpine Moon, 3x Fury, 2x Grafdiggers Cage, 1x Pithing Needle, 2x Unlicensed Hearse Additionally, if you suspect they have Collector Ouphe: Out: 2x Pyroblast In: 2x Dead // Gone Oath of Druids: Out: 3x Damping Sphere, 1x Shattering Spree, 2x Fable of the Mirror-Breaker, 1x Legion Warboss In: 2x Alpine Moon, 2x Dead // Gone, 2x Grafdiggers Cage, 1x Pithing Needle Creature-Based (Humans, etc.): Out: 3x Pyroblast, 3x Maddening Hex In: 2x Dead 3x Fury, 1x Pithing Needle If you dont think the opponent has good activated effects, like if theyre Mono W Humans without Cathar Commando, you can board in Unlicensed Hearse instead of Pithing Needle