I understand barring any other text affects, you "purchase" an attachment or ally using at least one resource of that sphere. My questions to confirm:
1) You may (barring attachment and text limits) place that attachment on any hero or ally of yours or of other players - regardless of that hero/ally's sphere?
2) You may give control of a newly purchased ally (regardless of sphere) to another player as well?
"Using at least one resource of that sphere"
Neutral cards aside, I thought all resources paid had to match the sphere?