Perhaps void should work like slivers do in magic.
1 Void quantum = 1 quantum of each element
Void bringer, 2 void quantums
Permanent
1 void, void call: Put a 1|1 voidling into play
Void crusher, 1 void quantum
Permanent
All void creatures get momentum
Void protector, 1 void quantum
Permanent
All void creatures get immortality
Hyper void, 1 void quantum
Permanent
All void creatures get adrenaline
Void expander, 1 void quantum
Permanent
All void creatures get +1|+1
And so on and so forth.