Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
Flashback—, Exile X blue cards from your graveyard. (You may cast this card from your graveyard for its flashback cost, then exile it. You can't exile Flash of Insight to pay for its own flashback cost.)

Each nonland card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard. (You may cast cards from your graveyard for their escape cost.)
At the beginning of the end step, sacrifice this enchantment.

This spell costs less to cast, where X is the greatest power among creatures you control.
: Add . You gain 2 life.
Whenever a nontoken creature you control enters, put a +1/+1 counter on it and draw a card.

Search your library and/or graveyard for a creature card with mana value X or less and put it onto the battlefield. If you search your library this way, shuffle. If X is 10 or more, creatures you control get +X/+X and gain haste until end of turn.

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional .

Each land is a Swamp in addition to its other land types.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

Creatures you control get +1/+1.
At the beginning of your end step, draw a card.

Whenever a creature dies, you may pay . If you do, you gain 1 life.

, : This artifact deals 1 damage to any target.

Snake offering (You may cast this spell any time you could cast an instant by sacrificing a Snake and paying the difference in mana costs between this and the sacrificed Snake. Mana cost includes color.)
: Untap all Forests and all green creatures. Activate only once each turn.

Enchant creature
Whenever enchanted creature deals damage to a creature, gain control of the other creature for as long as this Aura remains on the battlefield.

The Shire enters tapped unless you control a legendary creature.
: Add .
, , Tap an untapped creature you control: Create a Food token.

Discard a land card: This enchantment deals 2 damage to any target.

Sacrifice a creature: Draw cards equal to the sacrificed creature's power, then discard three cards.

Cast this spell only during your declare attackers step.
This turn, instead of declaring blockers, each defending player chooses any number of creatures they control and divides them into a number of piles equal to the number of attacking creatures for whom that player is the defending player. Creatures those players control that can block additional creatures may likewise be put into additional piles. Assign each pile to a different one of those attacking creatures at random. Each creature in a pile that can block the creature that pile is assigned to does so. (Piles can be empty.)

: Add .

, : Draw a card.

Flying
: This creature gets +1/+0 until end of turn. If this ability has been activated four or more times this turn, sacrifice this creature at the beginning of the next end step.