Prototype {1}{U}{U} — 2/1 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) When this creature enters, if you cast it, exile target instant or sorcery card with mana value less than or equal to this creature's power from your graveyard. Copy that card. You may cast the copy without paying its mana cost.

When this creature enters, if you cast it, discover 3. (Exile cards from the top of your library until you exile a nonland card with mana value 3 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Draw a card, then draw cards equal to the number of cards named Accumulated Knowledge in all graveyards.

Draw three cards, then put two cards from your hand on top of your library in any order.

Counter target spell.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.) Look at the top seven cards of your library. Put two of them into your hand and the rest on the bottom of your library in any order.

Lightning Bolt deals 3 damage to any target.

Counter target noncreature spell unless its controller pays {2}.

Destroy target creature. It can't be regenerated.

This land enters tapped. {T}, Sacrifice this land: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

This land enters tapped. {T}: Add {U}, {B}, or {R}.

({T}: Add {U}.)

({T}: Add {R}.)

This land enters tapped. {T}, Sacrifice this land: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

({T}: Add {B} or {R}.) This land enters tapped unless you control two or more basic lands.

({T}: Add {U} or {B}.) This land enters tapped unless you control two or more basic lands.

({T}: Add {B}.)

Choose a nonland card name. Target player reveals their hand and discards all cards with that name. Flashback—Sacrifice a creature. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Choose one. If you descended this turn, you may choose both instead. (You descended if a permanent card was put into your graveyard from anywhere.) • Destroy target creature or planeswalker. • Destroy target noncreature, nonland permanent with mana value 1 or less.