The only downside is that if/when your mana dork gets removed, you also stand to lose your biggest attacker
(Targeting opponents, anything they control, and/or cards in their graveyards is a crime
however, their serialized variants are only in Collector Boosters
You may tap Yuna to create mana
Basically, what I sought to accomplish with this Battle Box was to accentuate the positives I enjoy the most about Multiplayer (powerful Eternal Staples), while minimizing some of the characteristics of Commander that I dont find ideal (how when EDH decks are built and played optimally, it tends to create pods with four players gold-fishing combo decks like ships passing in the night)
Goblin Guide While it's of no use in EDH, a killer combination of haste and 2/2 statline for one mana makes Goblin Guide a historically excellent Modern card