Reach
When Thran Spider enters, you and target opponent each create a tapped Powerstone token.
: Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in a random order.

Draw extra cards to unleash the full potential of your Merfolk.

This creature enters with three oil counters on it.
At the beginning of combat on your turn, you may remove an oil counter from this creature. When you do, target creature you control gains your choice of flying, vigilance, deathtouch, or lifelink until end of turn.

Find ways to always attack

Whenever this creature attacks, you may have it get +4/+0 until end of turn. If you do, sacrifice it at the beginning of the next end step.

(Transforms from Journey to Eternity.)
: Add one mana of any color.
, : Return target creature card from your graveyard to the battlefield.

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

As this land enters, you may reveal a Goblin card from your hand. If you don't, this land enters tapped.
: Add or .

, Sacrifice this creature: Prevent all damage a source of your choice would deal to you this turn.

: Target artifact creature blocks this creature this turn if able.
: Target artifact creature can't block this creature this turn.

Flying, deathtouch
Whenever this creature attacks, each opponent loses 3 life.

Artifact Each creature you control that's a Clamfolk, Crab, Crocodile, Fish, Homarid, Jellyfish, Kraken, Leviathan, Lobster, Merfolk, Nautilus, Octopus, Otter, Oyster, Seal, Serpent, Shark, Shrimp, Sponge, Squid, Starfish, Trilobite, Turtle, Walrus, or Whale gets +2/+2.
At the beginning of your upkeep, if you control twelve different creatures from the above list and don't control a Brushwagg, you win the game.

Autograph Book enters with a page counter on it for each person who has signed it.
, , Remove a page counter from Autograph Book: Draw a card.

Whenever you crank Auto-Key, until end of turn, target creature becomes an artifact in addition to its other types and gains ": You gain 3 life."

: Add . Spend this mana only to activate an ability or cast an artifact spell.

When this creature enters, scry 2.

Prototype — 2/2
Vigilance
, : Put a +1/+1 counter on target Assembly-Worker you control.