msem-instigator

{T}, Sacrifice a land: Untap up to three target lands.

First strike, trample
Whenever Regal Coralhorn deals combat damage to a player or planeswalker, return target card with a cycling ability from your graveyard to your hand.
Cycling {2} ({2}, Discard this card: Draw a card.)

When Reha, Entropy's Call enters the battlefield, you may search your library for any number of land cards with different names and exile them with harvest counters, then shuffle.
At the beginning of your upkeep, you may put a card that you own in exile with a harvest counter on it at random onto the battlefield tapped.

When Relentless Toqui enters the battlefield, put two +1/+1 counters on a creature you control.
Creatures you control with counters on them have haste and menace.

As an additional cost to cast Reunite with Nature, sacrifice X creatures.
Create X plus one 3/1 red and green Elemental Horror creature tokens with haste and trample.

Choose one or both —
• Riverboat Assault deals 3 damage to target creature.
• Target creature gets +3/+3 until end of turn.

You may play this card transformed.
Trample

Trample
Rubble Tender's power and toughness are each equal to the number of land cards in your graveyard.
At the beginning of your upkeep, sacrifice a land, then search your library for up to two land cards, put them onto the battlefield tapped, then shuffle.

Trample
Whenever a noncreature permanent is put into a graveyard from the battlefield, put a +1/+1 counter on Ruinous Naga.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)
Whenever a creature enters the battlefield under your control, you may have it deal damage equal to its power to another target creature or planeswalker.
I, II, III — Exile the top two cards of your library. You may put a creature card from among them onto the battlefield with a +1/+1 counter on it. It gains haste.
IV — Creatures you control get +3/+3 and gain trample until end of turn.

When Sahra Poet-Priest enters the battlefield, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
{R}: Sahra Poet-Priest gets +1/+0 until end of turn.

Trample, haste
When Sahra, the Consuming enters the battlefield or attacks, sacrifice a permanent.
At the beginning of your end step, transform Sahra unless you've sacrificed two or more permanents this turn.

When Savannah Huntsman enters the battlefield, it deals X damage to target creature or planeswalker, where X is the number of counters among permanents you control.

Flying
When Scorchpass Sovereign enters the battlefield, it deals 1 damage to each creature with flying you don't control.

Whenever Seeker of Battle attacks, put a +1/+1 counter on each creature you control. Those creatures gain trample until end of turn.

Sera of Coppercove attacks each combat if able.
Whenever Sera of Coppercove attacks, it fights target creature you don't control.
{1}{R}{G}: Sera of Coppercove gets +3/+3 until end of turn.

Assault {2}{R}{G} (Whenever this attacks, if it has no +1/+1 counters on it, you may pay its assault cost to put a +1/+1 counter on it.)
When Shemesh assaults, other creatures you control get +2/+2 and gain trample until end of turn.

Whenever Shianne's Guardian or another creature enters the battlefield under your control, you may pay {1}{R}{G}. When you do, that creature deals damage equal to its power to any target.

If a source you control would produce two or more mana, you may have it produce an additional {C}.
{4}: Exile the top card of your library. You may play it until the end of your next turn.

You may look at the top card of your library any time, and you may play Deserts from the top of your library.
[+1]: You gain 1 life. You may discard a card. If you do, draw a card.
[–2]: Sihari deals 2 damage to any target. You may play an additional land this turn.
[–4]: Create an X/X red and green Sand Elemental creature token with trample and haste, where X is the number of lands you control.

Trample
Whenever Simian Sentinel attacks, it gets +X/+0 until end of turn, where X is the number of lore counters on Sagas you control.

Whenever Sirif of the Lord's Legion attacks, you may put a lore counter on target Saga you control.
Whenever Sirif deals combat damage to a player, you may remove a lore counter from target Saga you control.

Trample
Skalnir, Ruinbringer enters the battlefield with X +1/+1 counters on it.
When Skalnir, Ruinbringer enters the battlefield, it deals damage equal to the number of +1/+1 counters on it to each creature without trample.

Flying, trample, haste
Whenever a land enters the battlefield under your control or a land is put into your graveyard from the battlefield, Skyscreecher Dragon deals 2 damage to each opponent.

Solar Flare deals 3 damage to any target. You gain 3 life.