Call Sign

The next time one of your opponents attacks, you must block. The creature you control blocking the creature attacking with the most health gets +x/+0.
X is equal to target creature you control's power.
"Some dragons will speak to each other in strange ways, speaking with shrieks and vibrations from wings. It has
been observed that they have call signs for attacking, and
names for casual use"-Lauren Shren, Malin Shren's
Sister and Recon Expert.