Concentrate

Will still gain Energy even if you don't have 3 cards to discard.

Interactions[]

Unceasing Top: Can discard your hand for Energy, giving you a greater chance to be able to play whatever card you draw next. If it is drawn with Unceasing Top, meaning it is the only card in your hand, it can be used to gain Energy for free.
Ice Cream: Can be used at the end of your turn to guarantee a free 2 Energy next turn.
Pocketwatch: Can use increased card draw to feed discard, allowing other expensive or cost X cards to be played.
Typical Discard synergies:

Silent Cards
Starters		Strike • Defend • Neutralize • Survivor
Attacks	Common	Bane • Dagger Spray • Dagger Throw • Flying Knee • Poisoned Stab • Quick Slash • Slice • Sneaky Strike • Sucker Punch
	Uncommon	All-Out Attack • Backstab • Choke • Dash • Endless Agony • Eviscerate • Finisher • Flechettes • Heel Hook • Masterful Stab • Predator • Riddle with Holes • Skewer
	Rare	Die Die Die • Glass Knife • Grand Finale • Unload
Skills	Common	Acrobatics • Backflip • Blade Dance • Cloak and Dagger • Deadly Poison • Deflect • Dodge and Roll • Outmaneuver • Piercing Wail • Prepared
	Uncommon	Blur • Bouncing Flask • Calculated Gamble • Catalyst • Concentrate • Crippling Cloud • Distraction • Escape Plan • Expertise • Leg Sweep • Reflex • Setup • Tactician • Terror
	Rare	Adrenaline • Alchemize • Bullet Time • Burst • Corpse Explosion • Doppelganger • Malaise • Nightmare • Phantasmal Killer • Storm of Steel
Powers	Uncommon	Accuracy • Caltrops • Footwork • Infinite Blades • Noxious Fumes • Well-Laid Plans
Powers	Rare	A Thousand Cuts • After Image • Envenom • Tools of the Trade • Wraith Form