Alphys

Partner with Undyne.
Whenever you cast an instant or sorcery spell, copy
that spell, you may choose new targets for the copy.
{6}{r}{b}{t}, Create a legendary 4/4 artifact creature
token named Mettaton with haste, trample, flying
and when this creature deals damage to a player,
you win the game.
Actually, wait, I have an idea!
Let's be friends on UnderNet!