Vigilance
Creatures you control with vigilance have “{W}{U}, {T}: Draw a card. Activate this ability only if this creature attacked this turn.”

As Prodigious Hater enters, look at an opponent's hand, then choose a nonland card name.
Whenever an opponent casts a spell with the chosen name, Prodigious Hater deals 3 damage to that player.

Whenever you cast a spell, if mana from an artifact source was spent to cast it, you may pay 1 life. If you do, draw a card. Do this only once each turn.

Target player discards two cards. If all the cards discarded this way share a card type, that player loses 3 life.

Deathtouch
Whenever one or more artifact creatures you control deal combat damage to an opponent, you draw a card and you lose 1 life.

Whenever you cast a spell, you may pay {X}, where X is that spell's mana value. If you do, copy it. You may choose new targets for the copy. Do this only once each turn.

When Projects Overseer enters, surveil 2.

Trample, haste

{T}: Create a 1/1 blue Fish creature token with haste. Exile it at the beginning of the next end step. Activate only as a sorcery.

As an additional cost to cast spells during an opponent's turn, you may pay {U} and reveal Promethean Jaxl from your hand. If you do, you get a lurk counter.
Flash
Promethean Jaxl enters tapped.
When Promethean Jaxl enters, you draw a card for each lurk counter you have, then you lose all lurk counters.

Whenever you gain life, you may create a 0/0 colorless Robot artifact creature token with X +1/+1 counters on it, where X is the amount of life you gained. Do this only once each turn.

Enchant creature
Enchanted creature gets +1/+1 and can't block.
Wander {1}{B}

This spell costs {1} less to cast for each card in exile you don't own.
Trample
Ward—Exile a nonland, nontoken permanent you control.

Amity — This spell costs {R} less to cast if you attacked with exactly two creatures this turn.
When you cast your next instant or sorcery spell this turn, copy it. You may choose new targets for the copy.

Flash
Ward {4}
When Psychedelic Serpent enters, gain control of target instant spell, sorcery spell, activated ability, or triggered ability. You may choose new targets for it.

{U}: Psychohopper gains flying until end of turn.
{2}{G}: Psychohopper gets +2/+2 until end of turn. Activate only once each turn.

Target creature gets +1/+1 and gains deathtouch until end of turn. Scry 1.

Trample
Amity — Whenever you attack with Puddle Crasher and exactly one other creature, look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Enchant creature
Enchanted creature gets -X/-X, where X is your devotion to black.

Destroy target artifact. Pull the Wires deals 2 damage to that artifact's controller.

Tap up to two target nonland permanents. They lose all abilities until your next turn.

Trample
Whenever a creature you control attacks, put a +1/+1 counter on Pulse of the Unending Rave.
When Pulse of the Unending Rave dies, put its counters on up to one target creature you control. That creature becomes a copy of Pulse of the Unending Rave.

Choose one —
• Destroy target creature with flying.
• Exile target enchantment.
• Target creature you control gets +1/+1 and gains hexproof until end of turn.

If you control three or more enchantments, damage dealt by sources you control this turn can't be prevented.
Punishment from Nyx deals 2 damage to any target.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.
You choose which creatures block this turn and how those creatures block.