Enchant artifact or creature
Enchanted permanent loses all abilities and doesn't untap during its controller's untap step.
Wander {3}{U}{U}

Choose one —
• Exile target noncreature spell.
• Return target creature spell to its owner's hand. Draw a card.

When Snowscryer enters, surveil 3.

Flying
Springsoarer enters with a +1/+1 counter on it if a creature you controlled dealt combat damage to a player this turn.
Wander {2}{U}

Flash
Whenever you cast a spell during an opponent's turn, tap up to one target artifact or creature.

Counter target spell unless its controller pays {X}. If they do, create an X/X blue and black Fish creature token.

Draw three cards. Then discard two cards unless you discard a card with flashback.
Flashback {6}{U}{U}

When Tireless Aspirants enters, you may draw a card. If you do, discard a card.
Wander {1}{U}

Target artifact or creature you control becomes an artifact creature with base power and toughness 5/5 until end of turn.

Target creature can't be blocked this turn. If this spell's flashback cost was paid, put a +1/+1 counter on that creature.
Flashback {1}{U}

Creatures your opponents control get -1/-0.
Spellcharge 5

Whenever a creature entering the battlefield under your control causes an ability of a permanent you control to trigger, draw a card. This ability triggers only once each turn.

Tap up to one target creature. Creatures you don't control don't untap during their controllers' next untap step.
Flashback {4}{U}

Target player reveals their hand. You choose a nonland card from it or a card from their graveyard. Exile that card. You lose 1 life.

Look at the top three cards of your library. Put one into your hand and the rest into your graveyard.
Flashback—{B}, Discard a card.

Menace
Spellcharge 3
You may cast Archaic Straggler from your graveyard if you've spent at least three mana to cast spells this turn.

When Arduous Miners enters, you may have all players discard a card.
Whenever one or more cards leave your graveyard, create a tapped Treasure token.

Menace
When Askir enters, each opponent loses life equal to the amount of life they've lost this turn.
Wander—{1}{B}{B}, Pay 4 life.

As an additional cost to cast artifact spells, you may pay {2}. When you do, each opponent sacrifices an untapped creature.

Menace
Whenever you cast an artifact spell, each opponent loses 2 life.

Deathtouch
If an opponent would lose life, they lose that much life plus 1 instead.
Spellcharge 3

When Barbarous Roughrider enters or leaves the battlefield, each opponent loses 2 life unless they sacrifice a nontoken creature.
Wander {4}{B}{B}

Flash
When Blightfang Zyxthax enters, discard a card. If you do, it gains deathtouch until end of turn.

Choose one. If this spell's flashback cost was paid, instead choose three and you may choose the same mode more than once.
• Target player sacrifices a creature and a planeswalker.
• Target player discards two cards, then exiles their graveyard.
• All creatures get -2/-2 until end of turn.
Flashback {7}{B}{B}

Choose one —
• Target creature gets +2/+0 and gains indestructible until end of turn.
• Target player sacrifices a creature.