Have Umbris' effect trigger to playing and recurring Nightmares and Horros to exile cards from your opponent's deck, like "Ashiok, Nightmare Muse" and "Despoiler of Souls", or mill your opponent and exile their GY's with cards like "Soul-Guide Lantern" and "Planar Void". This will make Umbris have a major board presence and your opponent may not have many answers due to the excessive amount of milling. Equip Umbris with cards such as "Whispersilk Cloak" and "Shadowspear" to make sure Umbris can hit your opponent directly for lethal commander damage.

Suggestions

Updates Add

Comments

95% Casual

Competitive