At the beginning of your upkeep, create a Treasure token.
Whenever you sacrifice an artifact or enchantment, this creature deals 1 damage to each opponent.

Flying, haste
Whenever you attack, you may pay {R} and sacrifice two artifacts and/or enchantments. If you do, return this card from your graveyard to the battlefield tapped and attacking.

Defender
{3}{W}, {T}, Sacrifice Border Junction: Create three 1/1 colorless Soldier creature tokens. Activate only as a sorcery.

This spell costs {X} less to cast, where X is the number of Mountains you control plus the number of cards with a cycling ability in your graveyard.
Search your library for a Dragon or Phoenix card, put it onto the battlefield, then shuffle.
Mountaincycling {2}

Whenever a creature card or creature token is put into your graveyard from anywhere, put a +1/+1 counter on Bottom Feeder.

Bouncers-for-Hire can't attack unless you control a red permanent.

Destroy target tapped creature. If its power was 3 or less, you gain 3 life.
Create a Weapon token.

Whenever you cast an instant spell, put a +1/+1 counter on Brass Oracle.
Whenever you cast a sorcery spell, Brass Oracle deals damage to target opponent equal to its power.

Lifelink
Approval — {5}, {T}: Tap target creature. This ability costs {X} less to activate, where X is the number of colors among permanents you control.

Flying
When Breaching Jaxl enters, untap target nonland permanent.
Wander {2}{U}

Trample
Breaking Ground must be blocked if able.
{T}: Add {C}.
Spellcharge 9

Creatures you control get +X/+X and gain vigilance and trample until end of turn, where X is the number of Forests you control plus the number of cards with a cycling ability in your graveyard.
Forestcycling {2}

Choose one. If you control a Weather as you cast this spell, you may choose both instead.
• Counter target spell unless its controller pays {X}.
• Return target nonland permanent with mana value X or less to its owner's hand.

Trample
Landfall — Whenever a land you control enters, target creature blocks Brick Breaker this turn if able.

Exile target permanent you control. Return that card to the battlefield under its owner's control now or at the beginning of the next end step.

Bring Down the Sky deals X damage to each creature and each planeswalker. Put up to X exiled cards with flashback you own into your graveyard.

Target creature gets -X/-0 until end of turn, where X is the number of cards in your graveyard.
Draw a card.

Ninjutsu {2}{G}
When this creature enters, another target creature you control gains indestructible until end of turn. Untap it.

This spell costs {4} more to cast if it's your turn.
Return target nonland permanent to its owner's hand. If it's your turn, return up to two target nonland permanents to their owners' hands instead.

Once each turn, when you activate a nonmana ability, you may have Bubbling Firesnail deal 1 damage to each opponent.
{1}{R}: Bubbling Firesnail gets +2/-2 until end of turn.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. If this spell's flashback cost was paid, instead search your library for any number of land cards, put them onto the battlefield tapped, then shuffle.
Flashback {3}{W}{U}{B}{R}{G}

Level up {4}{G}{G}
[level 1-2] Trample
[level 3+] Trample

This land enters tapped.
Level up {G}{G}{G}
[level 1-2] Ward {2}
This land is also a creature.
[level 3+] Ward {2}
This land is also a creature.

Draw two cards. If {W} was spent to cast this spell, you gain 2 life. If {B} was spent to cast this spell, each opponent loses 2 life.

Vigilance
Whenever Builder of Monuments attacks, put a build counter on it. Then you may search your library for an artifact or enchantment card with mana value less than or equal to the number of build counters on Builder of Monuments, put that card onto the battlefield, then shuffle.