Solidarity
At the beginning of combat on your turn, target creature you control gets +2/+2, gains indestructible, and becomes an Avatar in addition to its other types until end of turn.

{T}: Add one mana of any color. If you have at least 3 life more than your starting life total, add two mana in any combination of colors instead.

Whenever Leyline Leecher attacks, you may pay {1}. If you do, integrate target card from a graveyard.
Leyline Leecher gets +1/+0 and has flying as long as an instant or sorcery card is integrated onto it.

{T}, Sacrifice Leyshard: Draw a card. Add one mana of any type.

At the beginning of your end step, untap another permanent. Then if it's your first turn of the game or you discarded a card named Leystone of Growth this turn, put a growth counter on that permanent. It gains “{T}: Add one mana of any type.”
Cycling {G}

At the beginning of your end step, Leystone of Storms deals 1 damage to each opponent. Then if it's your first turn of the game or you discarded a card named Leystone of Storms this turn, Leystone of Storms deals 1 damage to any target.
Cycling {R}

Whenever you cast an instant spell, up to one target creature gets +2/+2 until end of turn.
Whenever you cast a sorcery spell, reveal the top card of your library. If its mana value is less than the greatest power among creatures you control, put it into your hand.

This spell costs {2} less to cast if you attacked with a legendary creature this turn.
Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Equipped creature gets +2/-1.
Equip {1}

{T}: Add {R}{R}{R}. Spend this mana only to cast creature spells. If that mana is spent on a creature spell, it enters with an additional haste counter and decayed counter on it.

{1}, {T}: Add one mana of any color.
{2}, Sacrifice Living Compass: Draw a card.

Solidarity
Londel Sharpshot can't be blocked by creatures with power 2 or less.

Before equipped creature would assign, deal, or be dealt damage, sacrifice Lum Berry. If you do, equipped creature gets +1/+1 until end of turn.
When you sacrifice Lum Berry, you may exile equipped creature, then return that card to the battlefield under its owner's control. Put a +1/+1 counter on it.
Equip {1}

Whenever this Subroutine runs, you may pay {X} and sacrifice it. If you do, draw a card, then add X mana in any combination of colors.

Choose two —
• Create two Berry tokens.
• Create two 1/1 green Plant creature tokens.
• You gain 1 life for each token you control.

{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.

Whenever you cast a spell with mana value 4 or greater, create a 4/3 red and green Spirit Beast creature token.
Whenever a creature you control deals 4 or more damage to a player, draw a card. This ability triggers only once each turn.

{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.