Merciless Rage Upgrades for Greven, Predator Captain

The Mycosynth Gardens
50% of 2 decks +49% synergy
Reliquary Tower
33% of 3 decks +18% synergy
Blackcleave Cliffs
33% of 3 decks +17% synergy
Dragonskull Summit
33% of 3 decks -24% synergy
Foreboding Ruins
33% of 3 decks -13% synergy
Shizo, Death's Storehouse
33% of 3 decks +28% synergy
Smoldering Marsh
33% of 3 decks -31% synergy
Temple of Malice
33% of 3 decks -2% synergy
Cards to Cut
Sanitarium Skeleton
Cut from 100% of decks
Scaretiller
Cut from 100% of decks
Stromkirk Occultist
Cut from 100% of decks
Armillary Sphere
Cut from 67% of decks
Bloodhall Priest
Cut from 67% of decks
Gorgon Recluse
Cut from 67% of decks
Meteor Golem
Cut from 67% of decks
Rakdos Locket
Cut from 67% of decks
Asylum Visitor
Cut from 67% of decks
Bone Miser
Cut from 67% of decks
Hedonist's Trove
Cut from 67% of decks
Squee, Goblin Nabob
Cut from 67% of decks
Aeon Engine
Cut from 33% of decks
Anje's Ravager
Cut from 33% of decks
Bloodthirsty Blade
Cut from 33% of decks
Champion of Stray Souls
Cut from 33% of decks
Grave Scrabbler
Cut from 33% of decks
In Garruk's Wake
Cut from 33% of decks
Key to the City
Cut from 33% of decks
Magus of the Wheel
Cut from 33% of decks
Ob Nixilis Reignited
Cut from 33% of decks
Lands to Cut
Drownyard Temple
Cut from 67% of decks
Ash Barrens
Cut from 33% of decks
Barren Moor
Cut from 33% of decks
Cinder Barrens
Cut from 33% of decks
Forgotten Cave
Cut from 33% of decks
Rakdos Guildgate
Cut from 33% of decks
Terramorphic Expanse
Cut from 33% of decks
Geier Reach Sanitarium
Cut from 33% of decks
Sanctum of Eternity
Cut from 33% of decks