Malenia, Blade of of Miquella

Deathtouch, Lifelink, First Strike, Flying
When Malenia attacks, you may pay
{2}{b}{b}{b} and exert it.
If you do, Malenia gains Myriad and
Toxic 4 until end of turn.
When Malenia dies, Proliferate.
Heed my words. I am Malenia. Blade of Miquella.
And I have never known defeat.