Thundering Mightmare

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
As long as Thundering Mightmare is paired with another creature, each of those creatures has "Whenever an opponent casts a spell, put a +1/+1 counter on this creature."

Seelengebunden
Solange der Donnernde Machtmahr an eine andere Kreatur gebunden ist, haben beide Kreaturen „Immer wenn ein Gegner einen Zauberspruch wirkt, lege eine +1/+1-Marke auf diese Kreatur."