Passive: Lose [# or %] energy per second, whenever you pick up an Energy orb gain [# or %] additional energy for you and nearby allies. Lost energy is converted to health with [%] efficiency.
Ability 1 (Sow): Low health cost, short range aoe. Summon 'void tree tendrils' and seed enemy units for [#] seconds dealing medium piercing damage. When seeded unit dies [Warframe] recovers [# or %] energy and [# or %] health.
Ability 2 (Harvest): normal energy cost, large range aoe. Draw from the nearby enemies and corpses material dealing low piercing damage and reducing enemy armour by [%]. Gain [# or %] armour or damage reduction per [#] of enemies for [#] seconds.
Ability 3 (Spite): Drain heavy energy per second drain. [Warframe] ignites the void energy inside themselves greatly increasing their power while dealing moderate [Damage Type] to nearby enemies. Increases offensive and speed stats considerably.
Ability 4 (Pandemonium): normal energy cost, medium range aoe. Evoking the powers of the many warframes [warframe] unleashes unpredictable devastating effects onto an area. Deal heavy damage of [#] random elements or IPS with guaranteed status procs.
The idea is for a caster warframe that has to constantly manage its decaying energy in order to cast powerful abilities.