For each player, you choose from among the permanents that player controls an artifact, a creature, an enchantment, and a planeswalker. Then each player sacrifices all other nonland permanents they control.

, : This creature loses this ability and becomes an Aura enchantment with enchant creature. Attach it to target creature. You may pay to end this effect.
Enchanted creature gets +1/+1 and is an artifact in addition to its other types.

As an additional cost to cast this spell, discard a card or pay .
Lightning Axe deals 5 damage to target creature.

Flash
This spell costs less to cast, where X is the total power of creatures you control with flying.
Flying

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)
I — Scry 4, then you may reveal the top card of your library. If a planeswalker card is revealed this way, put it into your hand.
II — You may put a planeswalker card with mana value 6 or less from your hand onto the battlefield.
III — You may activate the loyalty abilities of planeswalkers you control twice this turn rather than only once.

When this creature enters, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
When this creature dies, you may draw a card.

Changeling (This card is every creature type.)
: This creature gains first strike until end of turn.

Flying

This land enters tapped unless you control a Mountain.
: Add .
, : Creatures you control get +1/+0 until end of turn.

: Target player draws a card, then discards a card.

: Add .
, , Sacrifice this land: Destroy target nonbasic land an opponent controls. That player may search their library for a basic land card, put it onto the battlefield, then shuffle. You create a Treasure token.

Untap target creature. It gets +2/+4 and gains reach until end of turn. (It can block creatures with flying.)

Flying (This creature can't be blocked except by creatures with flying or reach.)

: This creature gets +1/-2 until end of turn.

Up to two target creatures can't be blocked this turn.

Changeling (This card is every creature type.)
Flying

Crater's Claws deals X damage to any target.
Ferocious — Crater's Claws deals X plus 2 damage instead if you control a creature with power 4 or greater.

: Add .
: Put a charge counter on this land.
, Remove a charge counter from this land: Add one mana of any color.

Flash
Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.