Boxing Day

If you would lose unspent mana, that mana becomes colorless instead.

{T}: Add one mana of any color in your commander's color identity. Sacrifice Commander's Sphere: Draw a card.

Equipped creature gets +3/+3 and has protection from each color that's not in your commander's color identity. Equip commander {3} Equip {5}

{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle your library.

Flying Whenever Bladegriff Prototype deals combat damage to a player, destroy target nonland permanent of that player's choice that one of your opp...

{T}: Add one mana of any color in your commander's color identity.

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {W}.)

({T}: Add {W}.)

Vivid Creek enters the battlefield tapped with two charge counters on it. {T}: Add {U}. {T}, Remove a charge counter from Vivid Creek: Add one mana...

{T}: Add {C}. {2}{R}{W}, {T}: Target creature gains double strike until end of turn.

{T}: Add {C}. {4}, {T}: Target creature can't be blocked this turn.

Myriad Landscape enters the battlefield tapped. {T}: Add {C}. {2}, {T}, Sacrifice Myriad Landscape: Search your library for up to two basic land ca...

Forgotten Cave enters the battlefield tapped. {T}: Add {R}. Cycling {R} ({R}, Discard this card: Draw a card.)

{T}: Add one mana of any color in your commander's color identity.

{T}: Add {C}. {3}{G}, {T}, Sacrifice Blighted Woodland: Search your library for up to two basic land cards, put them onto the battlefield tapped, t...

{T}: Add {C}{C}.

{1}, {T}: Add {G}{U}.

Equipped creature has haste. (It can attack and {T} no matter when it came under your control.) At the beginning of your upkeep, put a +1/+1 counte...