Clockwork Beast [Limited Edition Beta] Sphinx you'd need the energy of

you'd need the energy of the giant's tonic

put one of those cards on top of your library and the rest on the bottom of your library in any order

Growl: Regenerate Bad Ass

Set: Iconic Masters Type: Instant Mythic Cost: {U}{U} Counter target spell

you may skip that turn instead

Clockwork Beast [Limited Edition Beta] Sphinx you'd need the energy ofSet: Limited Edition Beta Type: Artifact Creature Beast Rare Cost: {6} Clockwork Beast enters the battlefield with seven +1 +0 counters on it. At end of combat, if Clockwork Beast attacked or blocked this combat, remove a +1 +0 counter from it. {X}, {T}: Put up to X +1 +0 counters on Clockwork Beast. This ability can't cause the total number of +1 +0 counters on Clockwork Beast to be greater than seven. Activate this ability only during your upkeep.