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

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}

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

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

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

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

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

When Snowscryer enters the battlefield, surveil 3.

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

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

Flash
Whenever you cast Siflir, Elder Pawn or another spell, if you paid an alternate or additional cost to cast it, draw a card.
Wander {3}{U}{U}

When Shaman of Rime's Fury enters the battlefield, create a 0/0 colorless Spirit creature token. Put a number of +1/+1 counters on that token equal to the total number of instant and/or sorcery cards you own in exile and in your graveyard.

Whenever a land enters the battlefield under your control, scry 1. If that land is a Ruin, scry 2 instead.

Scry 2, then draw a card.
Flashback {4}{U}

Flash
When Sanctum of the Two Truths enters the battlefield, draw two cards.
Spellcharge 4

Whenever Recurring Visions enters the battlefield or you cast a spell which had its flashback cost paid, surveil 3.

Flash
This spell costs {1} less to cast for each permanent with flash you control and each instant card in your graveyard.
Ward {2}

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 the battlefield tapped.
When Promethean Jaxl enters the battlefield, you draw a card for each lurk counter you have, then you lose all lurk counters.

Defender
{2}{U}{U}: Permafrost Sentry becomes a copy of target Ruin you control.

Flash
When Permafrost Lynx enters the battlefield, target creature you don't control doesn't untap during its controller's next untap step.

Counter target spell. That spell's controller reveals their hand. Choose any number of nonland cards from it. That player puts those cards on the bottom of their library in any order, then draws that many cards.

Whenever you spend at least five mana to cast a spell, untap Opal-Eye Runeweaver.
{T}: Untap another target permanent not named Opal-Eye Runeweaver. Activate only as a sorcery.

Whenever Opal-Eye Allseer enters the battlefield or you cast a noncreature spell, create a 1/1 white Bird creature token with flying.
Wander—{1}{U}, Exile two instant and/or sorcery cards from your graveyard.

Target artifact or creature's owner puts it on the top or bottom of their library.
Flashback {5}{U}{U}

Put any number of target noncreature cards from your graveyard on top of your library in any order.
Draw a card, then exile Long-Lost Legacy.