• Rhino expends 75 energy to let out a forceful roar, increasing the damage output of himself and his allies within 15 / 20 / 22 / 25 meters. Rhino and affected allies gain 10% / 15% / 25% / 50% bonus damage to all weapons and abilities over a duration of 30 seconds.
  • The damage buff is considered Faction Damage Bonus, additive with other sources of Faction Damage, and multiplicative with other types of bonus of damage.
  • As faction bonus damage, the bonus is used twice in the calculation of status damage.
• The effects of Roar are applied to Rhino, allied Warframes, Companions, Hostages, Shadows, Specters, and hacked Shockwave MOAs.
• Allies only need to be in range at the time Roar is cast to gain its effects.
• Roar cannot be recast while active (except with the mod augment  Piercing Roar).
• Subsuming Rhino to the Helminth will offer Roar and its augments to be used by other Warframes.

Main article: Piercing Roar

Piercing Roar is a Warframe Augment Mod for  Rhino that gives  Roar the ability to inflict knockdown and 5  Puncture procs on enemies. Additionally allows Roar to be recast and passively increases its range.

Piercing Roar

• Increases the damage any ally deals from any source, so weapon damage as well as ability damage for the duration of the skill.
  • To gain the buff the ally needs be in range at the time of casting, entering it afterward will not grant the damage boost.
  • The ally does not need to stay in range to keep the buff for its full duration.
  • Regardless of the range the caster will always get the buff.
  • All Sources also include the tick damage of status procs like slash or gas, which means that DoT status procs -- slash, heat, toxin, and gas clouds -- all get affected twice, in the same way as faction-specific modifiers would affect status effects.
• Multiple Roars do not stack.
  • A stronger Roar will overwrite a weaker one.
  • However if a weaker is cast, so that it last longer than a stronger (i.e., it is cast right before the stronger ran out or has higher duration due to increased Ability Duration) it will boost the damage after the stronger ran out.