黑山之威血爪

Text:

由你施放且力量等于或大于4的生物咒语减少来施放。
每当黑山之威血爪攻击时，直到回合结束，每个由你操控且力量等于或大于4的生物各得+1/+1且获得践踏异能。

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.