Grixis decks struggle with mana unless theyre deep in treasure and even then, many Grixis decks are mana intensive while wanting to hold up interaction
Also, kudos for WotC on the design of these cards, because most of the spells are conditional spells
Higure, the Still Wind A slightly over-costed effect, but you get to search up a ninja card from your library and put it into your hand when Higure, the Still Wind deals combat damage to a player
Well, this deck manages to be bad against both
Two mana repeated blinks can outpace your opponents in value quickly, and if you blink something like Peregrine Drake you can generate infinite mana
While there is some replay value in drafting a Cube many times, players may eventually become familiar with the cards and strategies