Flash
Affinity for artifacts (This spell costs less to cast for each artifact you control.)
: Target creature gets +1/+0 until end of turn.

Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

As this artifact enters, choose a card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

As this enchantment enters, choose Mardu or Jeskai.
• Mardu — If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
• Jeskai — At the beginning of your upkeep, create a 1/1 red Goblin creature token. It gains lifelink and haste until end of turn.

: Add .
, : Add , , or .

(: Add .)

, : Prevent the next X damage that would be dealt to any target this turn.

Landfall — Whenever a land you control enters, create a 1/1 green Saproling creature token.

Destroy six target creatures.

As an additional cost to cast this spell, you may exile any number of blue cards from your hand. This spell costs less to cast for each card exiled this way.
Up to X target creatures phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)

At the beginning of your end step, put an invitation counter on this enchantment. If you attacked with two or more creatures this turn, draw a card. Otherwise, create a 1/1 white Human creature token. Then if this enchantment has three or more invitation counters on it, transform it.

Defender
Put a -0/-1 counter on this creature: Add . Activate only once each turn.

When Miles Morales enters, put a +1/+1 counter on each of up to two target creatures.
: Transform Miles Morales. Activate only as a sorcery.

: Add . If you control an Urza's Power-Plant and an Urza's Tower, add instead.

Trample
This creature enters with X +1/+1 counters on it.
When this creature enters, choose one —
• Double the number of +1/+1 counters on this creature.
• This creature fights target creature you don't control.

Enchant creature
Enchanted creature gets +1/+2.

This land enters tapped unless you control two or more other lands.
: Add or .

Flying, vigilance
Each instant and sorcery spell you cast has casualty 1. (As you cast that spell, you may sacrifice a creature with power 1 or greater. When you do, copy the spell and you may choose new targets for the copy.)

Spree (Choose one or more additional costs.)
+ — Mill four cards. You may put up to two creature and/or land cards from among the milled cards into your hand.
+ — You may put up to two creature cards from your hand onto the battlefield.
+ — Creatures you control with power 4 or greater gain hexproof and indestructible until end of turn.

Constellation — Whenever this creature or another enchantment you control enters, each opponent loses 1 life.