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You can fill the rest with cards you already own to reduce the cost of your deck even further

This is important because it allows you to set it to avoid the End Phase discard from Card of Demise

Watchwolf Loxodon Smiter Loxodon Hierarch Advent of the Wurm Armadillo Cloak Behemoth Sledge Eladamri's Call Feremef Enchantress (Enchtress decks only) Glittering Wish Mystic Enforcer Captured Sunlight (as a combo enabler) Qasali Ambusher Safehold Elite Seedcradle Witch (as a combo piece) Sterling Grove (Enchtress decks only) Thaumatog (Enchtress decks only) Sundering Growth Wildfield Borderpost Wheel of Sun and Moon

The fact that it also makes tokens that can crew it is a huge help as well

Banlist History Restriction changes recorded for Dark Element

As long as you don't mind frequently sliding your cards across the playmat for most of your games