Glyph (or Ritual) of Taming

[digital kayak]

A glyph that makes a hostile mob a permanent ally, with summoner sickness as long as the mob is alive and tamed (untame with dispel) to avoid taming other mobs such. A less op alternative might be a Taming Ritual (or an enhancement for the binding one), which can interact with a jar and perhaps may require an enhancement of a corresponding material, such as a jar with a zombie and rotting flesh on the ritual.
(Sorry for awfull english)

Glyph (or Ritual) of Taming

[vale crag]

could work by turning the mod into a familiar with a summoning sickness effect so that you could summon it at any time but in a limited way

might be problematic to have some mobs working with that though such as a wither or the dragon