Can you use Here to Help to play Deadbloom Predator to an opponent's battlefield on their turn?

Ruling: No, you cannot. Here to Help restricts you to playing a unit only to a battlefield you control, and this restriction overrides Deadbloom Predator's additional placement options.

Sequence:

• Here to Help resolves and allows you to play a unit to a battlefield you control
• When you choose to play Deadbloom Predator, you must select the target location as part of playing it
• The location choice is restricted by Here to Help to only battlefields you control
• Deadbloom Predator's text allowing placement to occupied enemy battlefields does not override this restriction
• You must play Deadbloom Predator to a battlefield you control, or not play it at all

Nuances:

• This follows the silver rule principle that restrictions override permissions ("can't beats can")
• The "may" on Here to Help makes playing a unit optional, but doesn't make the location restriction optional
• If Here to Help is played from hidden, the restriction is even tighter (must play to "here")
• If you have no legal targets (no battlefields you control), Here to Help does nothing and is wasted
• If a legal target becomes illegal before resolution, the effect whiffs