Cerberus, Guard of Volcan

Deathtouch, Defender, Flash, Lifelink
{o}{r}: Dash
Whenever Cerberus, Guard of Volcan blocks, its Double Strike ability becomes "triple strike" (It deals its damage before with and after the attacking creature).
Cerberus, Guard of Volcans attack is equal to the amount of mountains you have (cannot go above 4).