This might land you with zero Energy, but it can also land you with a ridiculous amount of Energy
Blacks planeswalker spread is pretty modest, which helps keep Phyrexian Arena in the conversation for most Cubeable black cards
It turns every one of your scarecrows (including changelings) into removal, so you can easily handle combo pieces, utility lands, or any problem that you can target and destroy
You can obtain the Greninja (1-Star Shiny rarity) card by opening Extradimensional Crisis from Extradimensional Crisis set
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Urborg, Tomb of Yawgmoth is a fantastic mana fixer for multicolor decks heavily reliant on black mana and Reckless Bushwhacker joins Goblin Bushwhacker to enable the beloved 8-Whack deck