Choose one —
• Tap target creature.
• Target creature can't be blocked this turn.
Surface {2}{U}

Create a token that's a copy of target creature you control, except it has base power and toughness X/X, where X is the number of Islands you control plus the number of cards with a cycling ability in your graveyard.
Islandcycling {2}

This spell costs {1} less to cast if there is a card named Avert Disaster or Imminent Disaster in your graveyard.
Counter target spell.

Return target creature to its owner's hand.

Tap up to two target creatures. Put a stun counter on each artifact tapped this way.

Enchant player
Enchanted player may cast blue spells with mana value less than or equal to their devotion to blue without paying their mana costs.

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.

Target creature gets -X/-0 until end of turn, where X is the number of cards in your graveyard.
Draw a card.

This spell costs {4} more to cast if it's your turn.
Return target nonland permanent to its owner's hand. If it's your turn, return up to two target nonland permanents to their owners' hands instead.

Draw two cards. If {W} was spent to cast this spell, you gain 2 life. If {B} was spent to cast this spell, each opponent loses 2 life.

Whenever this Subroutine runs, create a token that's a copy of target creature you control.

Counter all other spells. Exile up to one spell countered this way instead of putting it into its owner's graveyard. You may cast that spell for as long as it remains exiled, and mana of any type can be spent to cast it.

Choose one. If this spell's flashback cost was paid, instead choose three and you may choose the same mode more than once.
• Draw two cards.
• Create a token that's a copy of target artifact or creature you control.
• Target player mills seven cards.
Flashback {6}{U}{U}

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.

Time loop
I — Up to one other target nonland permanent phases out.
II — Draw two cards.
III — Create a blue enchantment token named Time Bubble with “Spells you cast cost {1} more to cast.”

Enchant creature
When Contain for Study enters, tap enchanted creature.
You control enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

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}

This artifact enters tapped.
{T}: Add one mana of any color. Spend this mana only to cast Subroutine spells.
{4}, {T}: Draw a card. This ability costs {1} less to activate for each time a Subroutine ran under your control this turn.

Choose one —
• Counter target spell unless its controller pays {2}.
• Counter target activated or triggered ability from a nonland source unless its controller pays {2}.

Counter target creature spell with toughness 2 or less.

Enchant creature
Enchanted creature gets -4/-0 and loses flying.

Counter target spell.
Draw a card if you control a legendary permanent.

Whenever you discard a card, you may have this enchantment become a 3/3 Dragon creature with flying in addition to its other types until end of turn.
{U}, Sacrifice this enchantment: Return target card you discarded this turn from your graveyard to your hand.

This spell costs {1} less to cast if you control a creature with flying.
Return target nonland permanent to its owner's hand.

Dynamo Glyphs enters with six minus X charge counters on it.
Whenever a creature you control attacks, remove a charge counter from Dynamo Glyphs. Then if it has no charge counters on it, sacrifice it. If you do, draw three cards.