Machina-Engine Dragon

Legendary Artifact Creature: Dragon

Flying, Improvise

Fabricate X

Recover (When a creature is put into your graveyard from play, you may pay and return this to your hand, otherwise exile ~.)

1/1

Make another creature using only keywords

Peakborn Automaton

Artifact Creature: Goblin

When this enters the battlefield, if you control a mountain, create a 1/1 colorless goblin artifact creature token

1/1

Cityborn Automaton

Artifact Creature: Human

As long as you control a plains, ~ has training.

0/2

Nothing is more generically white than the human creature type, so it only makes sense to make a human automaton.

Make a card using only keyword abilities

I forgot Wizards already did two "Monty Python and the Holy Grail" secret lairs, so I have to think of something else...

Astro Boy, the Iron-Armed Atom

Legendary Artifact Creature: Human Construct

Flying, First-Strike, Haste

; ~ gets +0/+2 until end of turn

; ~ get +2/+0 until end of turn

2/2

Wild

Holy Hand Grenade

Legendary Artifact:

Book of Armaments, chapter 2, verses nine through twenty-one. (Constructed by Saint Attila) , , , you may scry 3, you may mill 3, ; target opponent gains control of this artifact.

At the end of turn, if ~ is tapped, exile all creatures and artifacts you control.

"Skip a bit, brother." Maynard, brother of Maynard's brother to Maynard's brother.

Fun challenge! Wild

Illusion Engine

Artifact: Equipment

Whenever you equip ~, create a 2/2 blue illusion token with "Whenever this becomes the target of a spell, sacrifice it.".

equipped creature gets +2/+0

Whenever equipped creature leaves the battlefield, if it was an illusion, it does damage equal to its power to any target.

equip

Very fun! Repeat