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Allosaurus Rider Combo
A Modern deck, by David Mauro
1st place at a tournament in Glassboro, New Jersey, United States on 2020-01-12
As reported at http://www.starcitygames.com

Maindeck:

Creatures
4 Allosaurus Rider
2 Autochthon Wurm
4 Chancellor of the Annex
4 Chancellor of the Tangle
1 Laboratory Maniac
4 Simian Spirit Guide (Banned in Modern)

Instants
1 Angel's Grace
3 Manamorphose
4 Nourishing Shoal
4 Once Upon a Time (Banned in Modern)
1 Pact of Negation
4 Summoner's Pact

Legendary Creatures
2 Griselbrand

Sorceries
4 Eldritch Evolution
4 Neoform

Basic Snow Lands
1 Snow-Covered Forest
1 Snow-Covered Island

Lands
4 Botanical Sanctum
2 Breeding Pool
4 Gemstone Mine (Not currently legal in Modern)
2 Waterlogged Grove

Sideboard:
4 Force of Vigor
4 Through the Breach
3 Veil of Summer
2 Emrakul, the Aeons Torn
2 Ilharg, the Raze-Boar