Trinisphere - Darksteel (DST) Black The peaceful land of Slimenia

The peaceful land of Slimenia has been suddenly invaded by a mysterious cartel called "the Plob" who then proceed to kidnap all the slimes in the capital city of Boingburg

Flash Emerge {5}{U}{U} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value

Phenax isn't a creature

If you control an Urza's Mine and an Urza's Power-Plant

Addendum — If you cast this spell during your main phase

Trinisphere - Darksteel (DST) Black The peaceful land of SlimeniaAs long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)