mtg demon support cards A Deal With The Devil you may cast an enchantment spell by paying life equal to its mana value rather than paying its mana cost. MTG Cube: Top 10 Demons

(Landwalk is a static ability that restricts what creatures can block an attacking creature.) 702.13c A creature with landwalk is unblockable as long as the defending player controls at least one land with the specified subtype (as in "islandwalk"), with the specified supertype (as in "legendary landwalk"), without the specified supertype (as in "nonbasic landwalk"), or with both the specified supertype and the specified subtype (as in "snow swampwalk")

This is doubly true when you consider Xyris other ability, which lets both you and the opponent he damages draw cards equal to the damage he deals after swinging in

Both Vow of Wildness and Vow of Flight are key cards for this deck, they work perfectly in multiplayer because they allow your opponents to hurt each other, while you have immunity from attacks

Not fully blank cards this time, but rather the opposite