I like my combo of Hellion Wruption and Warstorm Surge in my overrun deck. Keep your opponent at bay by keeping an insane amount of creatures out at all times then drop Warstorm Surge which allows you to deal the power of a creature castes as direct damage to your opponent then drop Hellion Eruption which makes you sacrifice all your creatures and replace them with 4/4 creature tokens. A max of 5 creatures during this combo will annihilate your opponent with just this one combo
{Hellion Eruption}
{Warstorm Surge}