Mijae Djinn
Creature — Djinn
Whenever this creature attacks, flip a coin. If you lose the flip, remove this creature from combat and tap it.
Susan Van Camp
Summer Magic / Edgar (SUM)
• #166Rulings
Any abilities which have already resolved before the coin flip are not undone. Any abilities that trigger when it attacks which have not already resolved will still resolve.
(wotc • 2004-10-04)
The coin flip is done as a triggered ability on declaring the Djinn as an attacker.
(wotc • 2004-10-04)
If the Djinn attacks, but you lose the coin toss, then it is still considered to have attacked, and any other abilities that trigger on it attacking will resolve normally.
(wotc • 2004-10-04)
Rulings
Any abilities which have already resolved before the coin flip are not undone. Any abilities that trigger when it attacks which have not already resolved will still resolve.
(wotc • 2004-10-04)
The coin flip is done as a triggered ability on declaring the Djinn as an attacker.
(wotc • 2004-10-04)
If the Djinn attacks, but you lose the coin toss, then it is still considered to have attacked, and any other abilities that trigger on it attacking will resolve normally.
(wotc • 2004-10-04)