{R}, Sacrifice Magma Flow: It deals 3 damage to any target. Activate only as a sorcery.
{1}{R}, Discard a card, Sacrifice Magma Flow: Draw two cards.

Amity — Whenever you attack with Magma Grunt and exactly one other creature, Magma Grunt deals 1 damage to each opponent.

{2}: Magnetic Mystery gets +1/+0 until end of turn. Activate only as a sorcery.
As long as you control another artifact, Magnetic Mystery has flying.

When Magnetic Snuffler enters, return target Equipment card from your graveyard to the battlefield attached to Magnetic Snuffler.
Whenever you sacrifice an artifact, put a +1/+1 counter on Magnetic Snuffler.

{1}: Untap Magnetling.
{1}: Magnetling can't be blocked by creatures with power 2 or less this turn.
{1}: Choose a card type. Magnetling loses that type until end of turn.
{1}: Magnetling gets +1/-1 or -1/+1 until end of turn.

Trample
When Main Street Hooligang enters, if you control a green permanent, you may have Main Street Hooligang fight target creature.

{2}, {T}: Exile target creature you control, then reveal the top card of your library. If the revealed card is a creature card, put it onto the battlefield. Otherwise, return the exiled card to the battlefield under its owner's control.

Until end of turn, target creature gets +2/+2 and gains trample and “Whenever this creature deals combat damage to a player, return target permanent card with mana value less than or equal to the damage dealt from your graveyard to your hand.”

{T}: Add one mana of any color.
Whenever you cast a multicolored spell, untap Mana Harvesters. This ability triggers only once each turn.

As an additional cost to cast this spell, sacrifice a creature.
Exile the top X cards of your library, where X is the sacrificed creature's power. Until the end of your next turn, you may play those cards.

At the beginning of combat on your turn, you may have target Advisor you control get +2/-1 until end of turn.

Mass of Remains's power is equal to the total number of permanent cards you own in your graveyard and in exile.
Spellcharge 3

Target creature you control gets +2/+1 until end of turn. It fights up to one target creature you don't control.

Matter Harvester has protection from mana values less than the number of artifacts you control.
Whenever a nonland permanent you don't control leaves the battlefield, create a 1/1 colorless Cyborg artifact creature token.

Target creature you control gets +2/+2 until end of turn. It fights target creature you don't control.

When Menelaia enters, put a +1/+1 counter on up to three target creatures.
Whenever a creature you control with a counter on it becomes the target of a spell or ability you control, that creature gains hexproof and trample until end of turn.

Trample
Mercurial Wright gets +1/+0 for each other artifact you control.
{2}: Target permanent becomes an artifact in addition to its other types until end of turn.

Reach
Surface {4}{G}{G}

When Meteorite enters, it deals 2 damage to any target.
{T}: Add one mana of any color.

Trample
Creatures you control with trample have “{1}{R}{G}: This creature must be blocked each combat this turn if able.”

Exile the top three cards of your library. You may play up to two of those cards this turn.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. Then if you control three or more enchantments, draw a card.

{R}, {T}: Copy target activated ability you control. You may choose new targets for the copy.

Solidarity
When Minoan Engineer dies, create a 1/1 colorless Thopter artifact creature token with flying.

{T}: Add {C}.
{T}: Surveil 1. Return Mirage Island to its owner's hand.