How do I "get" the minor disciplines?

jamesatzephyr wrote: Spiritus - the vampire Muricia , but only on Gangrel Antitribu, who become Ahrimane at the same time. You could repeat that with Clan Impersonation (back to !Gangrel then repeat her special), but that's likely to be a waste of time. Similarly with Feral Spirit , which also targets Gangrel.

For spiritus there is also Visionquest:

Visionquest


+1 stealth action.
Put this card on the acting Ahrimane. This Ahrimane gets an additional level of Spiritus [spi] . If this action is blocked, this Ahrimane does not untap as normal during his or her next untap phase.

Artist(s): Peter Bergting
Set(s): HttB:C

Some other options:

Amulet of Temporal Perception
Unique equipment.
This vampire may burn 1 blood to play a card that requires basic Temporis [tem] from your hand. This equipment can be used only once each turn.

Ian Forestal
[AUS][DOM][THA]
Tremere antitribu
Capacity: 8
Group: 2
Sabbat: Ian may play cards that require a Discipline as though he has the basic level of that Discipline. Each Master: Discipline card placed on him gives him the superior level of that Discipline.