Flying
When Opportunistic Dragon enters, choose target Human or artifact an opponent controls. For as long as Opportunistic Dragon remains on the battlefield, gain control of that permanent, it loses all abilities, and it can’t attack or block.
If another player gains control of the permanent Opportunistic Dragon has kidnapped, that permanent doesn't regain its abilities and still can't attack or block.
04-10-2019
wotc
Opportunistic Dragon's effect doesn't expire if another player gains control of it or if it loses all abilities. The effect only expires once it's no longer on the battlefield.
04-10-2019
wotc
If the stolen permanent normally has any abilities that would trigger when Opportunistic Dragon dies, those abilities won't trigger.
04-10-2019
wotc
If Opportunistic Dragon leaves the battlefield before its triggered ability resolves, your opponent keeps control of their Human or artifact, it doesn't lose any abilities, and it can still attack or block as normal. You don't gain control of it at all.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.