5 Jul 2024
The Assassin token that you create enters the battlefield as a 1/1 creature. Any abilities that trigger when a creature with a certain power enters the battlefield will see the token enter as a 1/1 creature. Static abilities that affect the Assassin's power and toughness may change this.
5 Jul 2024
If the triggered ability causes two Assassins to be created (due to an effect such as that of Doubling Season), Headsplitter becomes attached to one of them.
5 Jul 2024
No player may take any actions between the time you create the Assassin token and the time Headsplitter becomes attached to it.