You will take a bit of an ink hit when he enters play, not only exerting all of your ink but bringing two of the cards back into your hand
While a card with an Adventure is in your hand, library, or even exile, it has only the characteristics of the permanent, not the Adventure spell
It doesnt though
Ultros, Obnoxious Octopus Rating: 6/10 Ultros, Obnoxious Octopus is very aptly named, because this card is really obnoxious
"Dash [cost]" means "You may cast this card by paying [cost] rather than its mana cost," "If this spell's dash cost was paid, return the permanent this spell becomes to its owner's hand at the beginning of the next end step," and "As long as this permanent's dash cost was paid, it has haste." If you choose to pay the dash cost rather than the mana cost, you're still casting the spell