Companion
1 Jegantha, the Wellspring

Deck
2 Dragonskull Summit
2 Rootbound Crag
1 Concealed Courtyard
1 Swamp
3 Inquisition of Kozilek
2 Zagoth Triome
1 Breeding Pool
2 Teferi, Hero of Dominaria
4 Thoughtseize
1 Binding the Old Gods
2 Overgrown Tomb
2 Indatha Triome
4 Raugrin Triome
3 Lightning Helix
1 Mortality Spear
2 Glacial Fortress
4 Vanishing Verse
4 Expressive Iteration
1 Ketria Triome
2 Watery Grave
4 Niv-Mizzet Reborn
4 Drown in the Loch
1 Drowned Catacomb
2 Cling to Dust
1 Hydroid Krasis
2 Savai Triome
2 Sacred Foundry

Sideboard
2 Dovin's Veto
1 Extinction Event
1 Mystical Dispute
1 Fracture
2 Grafdigger's Cage
3 Deafening Clarion
2 Raff Capashen, Ship's Mage
1 Lightning Helix
1 Assassin's Trophy
1 Jegantha, the Wellspring