Hybrid animal mayhem

As Thran Portal enters, choose a basic land type.
Thran Portal is the chosen type in addition to its other types.
Mana abilities of Thran Portal cost an additional 1 life to activate.

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

Find ways to always attack

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

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."

Whenever you cast a spell, create a 1/1 colorless Spirit creature token with "This token can't block or be blocked by non-Spirit creatures."
Exhaust — Waterbend : Take an extra turn after this one.

Lands you control have trample and hexproof.
: Add X mana of any one color, where X is the greatest power among creatures you control.

Firebending 4
: Create a 4/4 red Dragon creature token with flying and firebending 4.

Flying
Whenever you cast your second spell each turn, airbend up to one other target nonland permanent.

This land enters tapped.
When this land enters, you gain 1 life.
: Add or .

: Add .
: Add one mana of any color. Spend this mana only to cast a Hero spell or to activate an ability of a Hero source.
, : Look at the top three cards of your library. You may reveal a Hero card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Start your engines!
: Add .
Max speed — , , Discard a card: Draw a card.

Equipped creature gets +1/+0.
Equip

Equipped creature gets +2/+1 and has haste.
Equip

This land enters tapped.
: Add .
, , Sacrifice this land: Search your library for an Aura card and/or an Equipment card, reveal them, put them into your hand, then shuffle.