石殴りの巨人

{6}{R}{R}：怪物化３を行う。（このクリーチャーが怪物的でないなら、これの上に＋１/＋１カウンターを３個置く。これは怪物的になる。）
石殴りの巨人が怪物的になったとき、このターン、対戦相手がコントロールする飛行を持たないクリーチャーではブロックできない。

撼岩巨人

{6}{R}{R}：蛮化3。（如果此生物未蛮化，则在其上放置三个+1/+1指示物且它已蛮化。）
当撼岩巨人蛮化时，由对手操控且不具飞行异能的生物本回合不能进行阻挡。

Stoneshock Giant

{6}{R}{R}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)
When Stoneshock Giant becomes monstrous, creatures without flying your opponents control can't block this turn.

Commander Anthology Volume II

Conspiracy: Take the Crown

Commander 2015

Theros

An ability that triggers when a creature becomes monstrous won't trigger if that creature isn't on the battlefield when its monstrosity ability resolves.

If blockers have already been declared when Stoneshock Giant's last ability resolves, those blocks won't change or become undone.

Monstrous isn't an ability that a creature has. It's just something true about that creature. If the creature stops being a creature or loses its abilities, it will continue to be monstrous.

Once a creature becomes monstrous, it can't become monstrous again. If the creature is already monstrous when the monstrosity ability resolves, nothing happens.

Your opponents can't assign any creature without flying to block that turn, even if that creature had flying or wasn't on the battlefield under one of your opponent's control when Stoneshock Giant's ability resolved.