Griffeboyaux, terreur de Qal Sisma

Text:

Les sorts de créature de force supérieure ou égale à 4 que vous lancez coûtent de moins à lancer.
À chaque fois que Griffeboyaux, terreur de Qal Sisma attaque, chaque créature de force supérieure ou égale à 4 que vous contrôlez gagne +1/+1 et acquiert le piétinement jusqu'à la fin du tour.

Rulings:

• 7/13/2018 If you cast a creature spell that will enter the battlefield with a number of +1/+1 counters, such as Hungering Hydra, those counters aren’t considered when determining whether Goreclaw reduces that spell’s cost. Similarly, effects that will raise the creature’s power once it has entered the battlefield won’t apply.
• 7/13/2018 If another creature has an ability that changes its power when it attacks, such as Brawl-Bash Ogre, you may have that ability resolve before Goreclaw’s last ability.
• 7/13/2018 Goreclaw’s last ability affects only creatures you control with the appropriate power at the time it resolves. Creatures you begin to control later in the turn won’t get either bonus, and a creature you control whose power decreases later in the turn won’t lose either bonus.