The Cornucopia

{t} Add {b} or {2} to your mana pool.
{t},{b}, Create an arrow artifact token with "Sacrifice this artifact: target creature you control deals damage equal to its power to another creature."
{t},{1},{b},{b}, Regenerate a creature from your graveyard. It gains haste and deathtouch and is a capitol mutt in addition to its other types. sacrifice it during your next upkeep.
{t},{2},{b},{b},{b}, Each opponent sacrifices a creature.