Can you target your own creature with hexproof using a spell you control?

Hexproof is a static ability that reads: a permanent with hexproof cannot be the target of spells or abilities your opponents control (CR 702.11b). Wait — that's the standard wording, but the key detail is directionality: hexproof only protects against opponents, not the controller themselves.

Actually, to be precise: under CR 702.11b, hexproof means the permanent 'can't be the target of spells or abilities your opponents control.' This means you CAN target your own hexproof creature with your own spells or abilities. Hexproof only blocks targeting by opponents.

So the correct verdict is: Yes, you can target your own creature with hexproof using a spell you control. Hexproof does not restrict the controller of the permanent — it only restricts opponents from targeting it.

Concrete example: You control a Gladecover Scout (a 1/1 with hexproof). Your opponent cannot target it with Lightning Bolt. However, you can freely target your own Gladecover Scout with your own Giant Growth to pump it, because hexproof only stops your opponents, not you.

This is a common misconception. Shroud (CR 702.18b), by contrast, prevents any player — including the controller — from targeting the permanent. Hexproof is strictly one-directional, protecting only against opponents' spells and abilities.