Opportunistic Dragon

Mana cost: {2}{R}{R}
Type: Creature — Dragon
Power / toughness: 4 / 3
Set: Throne of Eldraine Promos #133s (rare)

Flying
When this creature enters, choose target Human or artifact an opponent controls. For as long as this creature remains on the battlefield, gain control of that permanent, it loses all abilities, and it can't attack or block.

Opportunistic Dragon has 7 printings, first in Throne of Eldraine (2019). EDHREC ranks it #8,384 among Commander cards. It appears most in Ureni of the Unwritten decks (5,679 on EDHREC). 2 public decks on TCG run it. It has 4 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: not legal
brawl: legal

Public decks that run Opportunistic Dragon

Draconic Rage - Forgotten Realms Commander, led by Vrondiss, Rage of Ancients
Temur Roar - Tarkir: Dragonstorm Commander, led by Eshki, Temur's Roar

Commanders that run Opportunistic Dragon most

Deck counts from EDHREC.

Often played with Opportunistic Dragon

Cards that show up in the same decks on EDHREC.

Rulings

2019-10-04: 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.
2019-10-04: 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.
2019-10-04: If the stolen permanent normally has any abilities that would trigger when Opportunistic Dragon dies, those abilities won't trigger.
2019-10-04: 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.