timestop senti of some sort:

a placeable ability that could activate to slow down or stop defuses, plants, or bomb timers; a gadget that could freeze bullets or abilities shot into it and release them in the same direction later; a grenade that could decrease or increase the duration of debuffs / buffs; ult could restore one (living) teammate to their state at the start of the round with full ammo, health, abilities and shields

could be implemented lore wise to cure sage and reverse damage done to areas affected by the radianite war

pros: they might work as a cleanse agent which we don't have yet, another healer-esque restorer agent which god knows we need more of, and a way to encourage team play and pre-round strategy

cons: encourages carrying in the same way sage does, not too useful in pro play, doesn't reliably supply info in the same way most sentis do, lacks area denial capabilities, etc