Sans

{t}: Create a 1/1 bone artifact token with "When
you own 3 bones, bonestab and deal 10 damage
to any nonplayer target."
{3},{t}: Sans deals 5 damage to target player.
{x}{b}{b}{b}{b}: Create X 0/1 Gaster Blaster creature
tokens with "At the end of the next turn, Gaster
Blaster deals 10 damage to any target. This
creature can be attacked by other creatures."
{9}{b}{b},{t}, Sacrifice Sans: Destroy target player.