If I use Hostile Takeover to take control of an enemy unit, does the reminder text 'otherwise, conquer' mean I can directly conquer the battlefield, even if I already control it or if it's the only enemy unit there?

Ruling: The reminder text on Hostile Takeover is not actual rules text and does not override normal game rules. You cannot conquer a battlefield you already control, and taking control of an enemy unit does not result in a direct conquer in any scenario.

Sequence:

• When Hostile Takeover resolves and you take control of an enemy unit, normal battlefield control rules apply
• If you already controlled the battlefield, nothing changes (you can't conquer what you already control)
• If the opponent controlled the battlefield and loses their last unit there, they lose control and the battlefield becomes contested when your unit appears
• This triggers either a continuation of an existing showdown or the start of a new showdown (open or combat depending on circumstances)
• Control is only established at the end of a showdown after applying contested status

Nuances:

• The reminder text is misleading and doesn't cover all possible outcomes
• If played during an existing showdown, that showdown continues after Hostile Takeover resolves
• If played from hand on your turn against a lone enemy unit, it should start an open showdown (though the exact rules interaction here may need clarification)
• Control loss and contested status application timing creates a "Stormbringer situation" that may require cleanup step resolution