Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature gets +20/+20.

Equipped creature gets +10/+10 and loses flying.
Equip

Defender, indestructible
: Monstrosity 10.
As long as this creature is monstrous, it has trample and can attack as though it didn't have defender.

Trample
This creature doesn't untap during your untap step.
: Untap this creature. Activate only during your upkeep.

When this creature enters, it deals 3 damage to each opponent and you gain 3 life.
When this creature dies, discard any number of cards, then draw that many cards plus one.

During your turn, Colossus has indestructible.
Other Mutants you control get +1/+1.

Enchant artifact or creature
Enchanted permanent doesn't untap during its controller's untap step.

Flying
Inklings can't attack you or planeswalkers you control.
Whenever a player attacks one of your opponents, that attacking player creates a tapped 2/1 white and black Inkling creature token with flying that's attacking that opponent.

If this creature hasn't been exerted this turn, you may exert it as it attacks. When you do, untap all other creatures you control and after this phase, there is an additional combat phase.

, Sacrifice this creature: Draw a card.
Unearth

: Prevent the next 1 damage that would be dealt to any target this turn.

Flying
At the beginning of combat on your turn, target creature you control gets +1/+0 and gains vigilance until end of turn.

Enchant creature
Enchanted creature has "Whenever this creature deals combat damage to a player, draw a card."
As long as enchanted creature is legendary, it gets +1/+1 and has ward .

Prototype — 1/1
Double strike
When this creature enters, draw a card.

Target player draws two cards. Put a +1/+1 counter on up to one target creature you control.

Creature tokens you control have flying.
, , Sacrifice a token: Create a 4/4 green Beast creature token. Activate only as a sorcery.

, : This turn, each creature you control enters with an additional +1/+1 counter on it.
, : Move a +1/+1 counter from target creature you control onto another target creature you control.

Two target creatures your team controls each deal damage equal to their power to target creature.

This spell can't be countered.
Combust deals 5 damage to target white or blue creature. The damage can't be prevented.

First strike
When this creature enters, target opponent may have you draw three cards. If the player doesn't, you mill three cards, then this creature deals damage to that player equal to the total mana value of those cards.

Whenever Combustion Man attacks, destroy target permanent unless its controller has Combustion Man deal damage to them equal to his power.

Combustion Technique deals damage equal to 2 plus the number of Lesson cards in your graveyard to target creature. If that creature would die this turn, exile it instead.

Destroy target creature. If a creature card is put into a graveyard this way, return it to the battlefield under your control. Sacrifice it at the beginning of your next end step.

Lifelink
Whenever this creature attacks, you may sacrifice another creature or artifact. If you do, this creature gets +2/+0 until end of turn.

Prevent all damage that would be dealt to you and planeswalkers you control this turn by sources you don't control. If damage from a creature source is prevented this way, Comeuppance deals that much damage to that creature. If damage from a noncreature source is prevented this way, Comeuppance deals that much damage to the source's controller.

Whenever you gain life, put a growth counter on this enchantment.
As long as there are five or more growth counters on this enchantment, creatures you control get +3/+3.

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Open an Attraction. (Put the top card of your Attraction deck onto the battlefield.)