Flying, hasteWhenever a creature you control with flying and/or haste attacks, you get 20% cooler. (You start at 0% coolness.)Sonic Rainboom — : If you're at least 100% cool, add , draw a card, and reset your coolness.
Whenever you cast a noncreature spell, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)Delirium — As long as there are four or more card types among cards in your graveyard, this creature gets +2/+2, has flying, and attacks each combat if able.
Landfall — Whenever a land you control enters, put a +1/+1 counter on target creature.: Double the number of +1/+1 counters on each creature you control.
Field of the Dead enters tapped.: Add .Whenever Field of the Dead or another land you control enters, if you control seven or more lands with different names, create a 2/2 black Zombie creature token.
A deck can have any number of cards named Shadowborn Apostle., Sacrifice six creatures named Shadowborn Apostle: Search your library for a Demon creature card, put it onto the battlefield, then shuffle.
Sliver creatures you control have "When this creature enters, you may exile target creature an opponent controls until this creature leaves the battlefield."
