Flying, trample, rampage 4

(Transforms from Brass's Tunnel-Grinder.)
: Add .
Whenever you cast a permanent spell using mana produced by Tecutlan, discover X, where X is that spell's mana value.

As an additional cost to cast this spell, sacrifice half the lands you control, rounded up.
Hexproof
Lands you control have ": Add three mana of any one color."

Destroy target land. Creatures without flying can't block this turn.

Each land card in your hand has cycling .
Cycling

Whenever a land enters, tap all lands its controller controls.

Haste
Whenever this creature attacks, each player who controls the most lands sacrifices two lands of their choice.

Tectonic Hazard deals 1 damage to each opponent and each creature they control.

Whenever this creature attacks or becomes the target of a spell an opponent controls, choose one —
• This creature deals 3 damage to each opponent.
• Exile the top two cards of your library. Choose one of them. Until the end of your next turn, you may play that card.

Echo
This creature attacks each combat if able.

: Add .
, , Sacrifice this land: Destroy target nonbasic land. Activate only if an opponent controls four or more lands.

Fathomless descent — This spell costs less to cast for each permanent card in your graveyard.
Menace, deathtouch
Whenever you sacrifice another permanent, draw a card.

When this creature enters, mill three cards, then return any number of artifact creature cards with total mana value 6 or less from your graveyard to the battlefield.

Reach, trample
This creature can't attack or block unless its power is 6 or greater.
, Sacrifice another artifact: Draw a card. Put a +1/+1 counter on this creature.

This spell can't be countered.
Tears of Valakut deals 5 damage to target creature with flying.

Cast this spell only during the declare attackers step.
Attacking creatures you control get +X/+0 until end of turn, where X is the number of attacking creatures. Sacrifice those creatures at the beginning of the next end step.

Sacrifice this creature: You may tap or untap target creature.

Kicker
Exile target artifact or enchantment. If this spell was kicked, exile target nonland permanent instead.

Menace
Whenever you expend 4, this creature deals 2 damage to each opponent.

Whenever a Hero you control enters, you gain 1 life.
: Add one mana of any color.

Teamwork 1
Target creature gains double strike until end of turn. If this spell was cast using teamwork, that creature also gains trample until end of turn.

All creatures controlled by target player and their teammates get +1/+1 until end of turn.

Equipped creature gets +1/+1 and has vigilance and trample.
Equip creature token
Equip

Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of creatures you control.
, Discard this card: It deals damage equal to the number of creatures you control to target creature.

(As this Saga enters and after your draw step, add a lore counter.)
Mill three cards. Create a 1/1 colorless Spirit creature token.
Put a +1/+1 counter on target creature you control.
Exile this Saga, then return it to the battlefield transformed under your control.

If an opponent has more cards in hand than you, draw two cards. Draw three cards instead if an opponent has at least four more cards in hand than you.

, Sacrifice Teacher's Pet: Search your library for a card with augment, combine it with target host you control, then shuffle.

Menace
Whenever this creature attacks, you gain 1 life.
: Return this card from your graveyard to the battlefield tapped.