Whenever Inner Ring's Pupil enters or attacks, target player discards a card. If they can't, they sacrifice a creature. If they can't, they lose 7 life.

The next spell you cast this turn may be cast as though it had flash. When you cast that spell, copy it. You may choose new targets for the copy.
Flashback {3}{U}{U}

Enchant creature
When Stasis Chamber enters, if you control a creature with vigilance, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Reach
When this creature enters, create a green Subroutine enchantment token named MOUNT with “Whenever this Subroutine runs, target creature you control gets +2/+2 until end of turn.”

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast Shrine spells or activate abilities of Shrines.

{T}: Add one mana of any color. Put a tide counter on Tidelock Pearl.
{1}{U}, {T}, Sacrifice Tidelock Pearl: Search your library for a Kraken, Leviathan, Octopus, or Serpent card with mana value less than or equal to the number of tide counters on Tidelock Pearl, put it onto the battlefield, then shuffle.

Trample
Whenever a creature you control attacks alone, put four +1/+1 counters on it.

Trample, haste
Landfall — When a land you control enters, target creature can't block this turn.
At the beginning of your end step, return Generator Alpha or a land you control to its owner's hand.

Target creature gains indestructible until end of turn. Teach it lifelink.

Whenever a token you control enters, put a +1/+1, flying, haste, trample, vigilance, or loyalty counter on a permanent you control other than Simul.
[+1]: Create a 1/1 green Plant creature token.
[–2]: Create a blue Aura enchantment token with enchant permanent and “When enchanted permanent dies, you draw two cards.”
[–5]: Create a 3/3 green, blue, and red Dragon creature token with flying. For each kind of counter on permanents you control, you may put a counter of that kind on it.

Choose one. If you control a Weather as you cast this spell, you may choose both instead.
• Counter target spell unless its controller pays {X}.
• Return target nonland permanent with mana value X or less to its owner's hand.

Equipped creature gets +2/+0 and has protection from permanents and spells with greater mana value than itself. This effect doesn't remove Titansbane.
Equip {2}{W}

Damned — When this creature enters, mill three cards. If you've sacrificed a permanent this turn, you may return one of the milled cards to your hand.

When Silence the Opposition enters, draw two cards, then discard a card.
A creature card or creature token was put into your graveyard from anywhere this turn.

Whenever you cast a spell, if mana from an artifact source was spent to cast it, you may copy that spell, and you may choose new targets for the copy. Do this only once each turn.

Reach
When this creature enters, if you played a land from exile or cast a spell from exile this turn, it fights up to one target creature.

Draw three cards, then discard a card. If you controlled a white permanent as you cast this spell, tap up to one target nonland permanent.

Enchant creature
When Collector's Item enters, surveil 2.
Enchanted creature loses all abilities and is a colorless Sculpture creature with base power and toughness 0/2.

Landfall — Whenever a land you control enters, each opponent loses 1 life.

Enchant creature
Enchanted creature has menace and “Whenever this creature deals combat damage to a player, create a Treasure token.”

Runway Mech enters with a +1/+1 counter on it.

Flying
When Daybreak Rider enters, you may bless another target creature.

Lifelink, ward {1}
Whenever Basilo, Lion of Valor attacks, you may bless target nonenchanted creature.

This spell costs {2} less to cast if your devotion to blue is three or greater.
Scry 2, then draw two cards.

When this creature enters, create X green Subroutine enchantment tokens named MOUNT with “Whenever this Subroutine runs, target creature you control gets +2/+2 until end of turn.”