Regidrago

Damage dealt by Dragons you control deals that much damage plus 2 instead.
{u/r}, {t}: Regidrago deals X damage divided as you choose among any number of target attacking or blocking creatures, where X is its toughness plus the number of cards in your hand. {2}, {t}: Put a shield counter on Regidrago if there isn't one on it. (If it would be dealt damage or destroyed, remove a shield counter from it instead.) {u/r}{u/r}: Regidr