mtg card box AFIING Deck 6 In1 with MTG Playma,Premium Storage Box with 5 Pcs MTG Deck Box Holds 2400+ Trading Cards, Large TCG Card Deck Case for Magic Yugioh Sports This premium deck box is made for players who want more than protection for their Commander deck Arkeiliy Card Deck Box, 110+

And you can stave off a problem creature by getting Duggans power high enough to deal twice his power to it

I think you need lots of protection, graveyard filling and perhaps even lifegain before you can think about running this in most cube decks which in turn makes it unsuitable for most cubes

(To proliferate, choose any number of permanents and/or players, then give each another counter of each kind already there.) Legendary Creature - Warrior Mutant Proliferate (CTRL to add secondary) Protection Protection (CTRL to add secondary) Pump Vivien, Champion of the Wilds You may cast creature spells as though they had flash

The Mana Base Balancing your mana sources in a 5-color deck is always the trickiest part