This is a three color midrange-combo deck. It looks to be interactive with tools like Thoughtseize and Abrupt Decay, while beating down with cards like Sylvan Advocate. Our combo utilizes Walking Ballista alongside Heliod, Sun-Crowned to deal unlimited damage.

Planeswalkers (2)
2
Liliana, the Last Hope
Creatures (13)
4
Sylvan Advocate
2
Murderous Rider
2
Nissa, Vastwood Seer
1
Kalitas, Traitor of Ghet
2
Siege Rhino
1
Ishkanah, Grafwidow
1
Massacre Girl
Spells (12)
3
Fatal Push
4
Thoughtseize
3
Traverse the Ulvenwald
2
Assassin's Trophy
Artifacts (4)
4
Walking Ballista
Enchantments (4)
3
Courser of Kruphix
1
Heliod, Sun-Crowned
Lands (25)
3
Blooming Marsh
4
Fabled Passage
3
Forest
3
Godless Shrine
4
Overgrown Tomb
1
Plains
3
Shambling Vent
2
Swamp
2
Temple Garden
Cards (60)
Sideboard (15)
1
Fatal Push
2
Abrupt Decay
2
Agonizing Remorse
1
Damping Sphere
1
Declaration in Stone
3
Rest in Peace
2
Lost Legacy
1
Kalitas, Traitor of Ghet
1
Ishkanah, Grafwidow
1
Emrakul, the Promised End