For everything this spell does, and the fact youre probably getting a one mana discount from your various support pieces, its a home run design
Delve is a sweet mechanic in general, and in spite of how dangerous I feel cards such as Treasure Cruise and Dig Through Time are in Eternal formats, at the very least theyre exciting dangerous cards, not annoying as hell ones like True-Name Nemesis
Then I remembered red has a ton of effects that make tokens until the end of the turn
Were already seeing Zendikar Rising experiment with using different card types as the front side of these, which will affect deck-building and combo options across various formats (the front side determines how you can search for or target these cards when they arent in play)
Eggman might be fun, and Sonic the Hedgehog is well, I dont think we have another legend that cares about flash and haste
1 Armored Skyhunter