Naya Guildmage

{1}{r},{t}: Create a 3/1 Elemental creature token with haste. Exile it at the beginning of the next end step.
{3}{g}{g},{t}: The next time a creature enters the battlefield under your control, you may create a token that's a copy of that creature.
{1}{w},{t}: Create a 0/6 Wall creature token with defender. Exile it at the beginning of the next end step.