Look at the top three cards of target player's library, then put them back in any order. You may have that player shuffle their library.
Draw a card at the beginning of the next turn's upkeep.

Counter target spell unless its controller pays . If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Each player loses a third of their life, then discards a third of the cards in their hand, then sacrifices a third of the creatures they control, then sacrifices a third of the lands they control. Round up each time.

, : Target creature gets -2/-0 until end of turn.

As Primal Clay enters the battlefield, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)

At the beginning of each player's upkeep, Primal Order deals damage to that player equal to the number of nonbasic lands they control.

Primordial Ooze attacks each combat if able.
At the beginning of your upkeep, put a +1/+1 counter on Primordial Ooze. Then you may pay , where X is the number of +1/+1 counters on it. If you don't, tap Primordial Ooze and it deals X damage to you.

Enchant creature
As Prismatic Ward enters the battlefield, choose a color.
Prevent all damage that would be dealt to enchanted creature by sources of the chosen color.

: Prodigal Sorcerer deals 1 damage to any target.

Enchant land
Whenever enchanted land becomes tapped, Psychic Venom deals 2 damage to that land's controller.

Choose one —
• Counter target spell if it's blue.
• Destroy target permanent if it's blue.

Pyrotechnics deals 4 damage divided as you choose among any number of targets.

Vigilance
Rabid Wombat gets +2/+2 for each Aura attached to it.

: Target creature loses flying until end of turn.

, : Target opponent reveals their hand and discards a creature card at random. Activate this ability only during your turn.

Return target creature card from your graveyard to your hand.

Untap target creature an opponent controls and gain control of it until end of turn. That creature gains haste until end of turn. When you lose control of the creature, tap it.

Discard X cards, then return a card from your graveyard to your hand for each card discarded this way. Exile Recall.

Whenever Reef Pirates deals damage to an opponent, that player mills a card.

Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.)
: Regenerate enchanted creature. (The next time that creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)