At the beginning of each end step, each player discards their hand.

Counter target spell unless its controller pays . Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Counter target enchantment, instant, or sorcery spell. Its controller creates a 2/2 blue Bird creature token with flying.

Target opponent reveals the top seven cards of their library. You may cast an instant or sorcery spell from among them without paying its mana cost. Then that player puts the rest into their graveyard.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, you may cast up to two instant and/or sorcery spells from among the revealed cards instead of one.

[+1]: Draw a card, then discard a card at random.
[−4]: Tibalt, the Fiend-Blooded deals damage equal to the number of cards in target player's hand to that player.
[−6]: Gain control of all creatures until end of turn. Untap them. They gain haste until end of turn.

Defender
Reach (This creature can block creatures with flying.)
: Regenerate Trestle Troll.

When Ugin's Construct enters the battlefield, sacrifice a permanent that's one or more colors.

As Ulamog's Despoiler enters the battlefield, you may put two cards your opponents own from exile into their owners' graveyards. If you do, Ulamog's Despoiler enters the battlefield with four +1/+1 counters on it.

Wayfaring Temple's power and toughness are each equal to the number of creatures you control.
Whenever Wayfaring Temple deals combat damage to a player, populate. (Create a token that's a copy of a creature token you control.)

Return all Zombie creature cards from your graveyard to the battlefield tapped, then destroy all Humans.