This spell can't be countered.
Hexproof
As long as you're ancient, creatures you control have trample and haste.

Whenever Skotha enters the battlefield or attacks, target player discards a card and you untap all lands you control.
{2}{B}{G}: Return Skotha from your graveyard to the battlefield, then put it on the bottom of its owner's library. Activate only as a sorcery.

Tempting Darkfiend enters the battlefield with a flying counter on it unless an opponent pays 2 life. The same is true for menace, deathtouch, lifelink, and indestructible counters.

Lifelink
Indulgence
Whenever you indulge, you may gain control of target nonland permanent for as long as you control The Beauclaire Family.

When Truffletusk enters the battlefield, create a Food token.
Whenever you sacrifice a Food, you may create a 1/1 white Soldier creature token with vigilance.

Trample
{1}{G}, Discard Twisted Deadwood: Reveal the top four cards of your library. Put a land card from among them into your hand and the rest into your graveyard.

Flying, menace
As Uninvited Vampire enters the battlefield, choose a creature an opponent controls. Uninvited Vampire has defender as long as that creature is on the battlefield.

Ward {3}
At the beginning of your end step, create a 1/1 green Goat Spirit creature token. For each kind of counter on Warden of Herds, you may put that many counters of that kind on that token.

As long as you control four or more lands with different names, Worldtreader Beast can't be blocked by creatures with power 2 or less.

Flash
When Zyxthax Apex enters the battlefield, each opponent loses 3 life and you gain 3 life.
When Zyxthax Apex leaves your graveyard, each opponent loses 3 life and you gain 3 life.

Vigilance
Whenever another creature you control dies, return to your hand target enchantment card from your graveyard with lesser mana value.

Trample
{T}, Pay 1 life: Add {C}.
Whenever Alranta Unleashed deals combat damage to a player, untap each Ruin you control. They become creatures in addition to their other types until the end of your next turn.
Spellcharge 6

Reach
If a creature you control would deal combat damage to a permanent or player, you may have it deal damage equal to your devotion to green instead.

Whenever a creature dies, you draw a card and you lose 1 life.
At the beginning of your end step, put a decay counter on Arcet. It deals X damage to each player, planeswalker, and other creature, where X is the number of decay counters on it.
Escape—{4}{B}{B}{B}, Exile the top thirteen cards of your library.

Flying, menace
When Archon of Condemnation enters the battlefield, you may bless target creature.
At the beginning of your upkeep, you may sacrifice a creature. If you do, bless target creature.

Menace
When Askir enters the battlefield, each opponent loses life equal to the amount of life they've lost this turn.
Wander—{1}{B}{B}, Pay 4 life.

Flying
Drop — Whenever Avatar of the Airwaves or another creature enters the battlefield under your control, if the entering creature was cast and you didn't cast any creature spells during your last turn, create a token that's a copy of target non-Avatar creature you control.

Vigilance
Drop — Whenever Avatar of the Festival or another creature enters the battlefield under your control, if the entering creature was cast and you didn't cast any creature spells during your last turn, you may have your life total become the total power and toughness of creatures you control.

Menace
Bastion Breaker can't block.

Defender, reach

Reach, haste
Drop — When Beat Devastator enters the battlefield, if you didn't cast any creature spells during your last turn, Beat Devastator gains vigilance until end of turn. Up to one target creature blocks it this turn if able.

Trample
When Belligerent Peluda enters the battlefield, it deals 2 damage to any target.

When Blasphemous Bonecaller enters the battlefield or dies, you draw a card and you lose 1 life.
{1}{B}, Discard Blasphemous Bonecaller: You draw a card and you lose 1 life.

Vigilance
Whenever Builder of Monuments enters the battlefield or attacks, put a build counter on it.
{T}, Remove X build counters from Builder of Monuments: Search your library for an artifact or enchantment card with mana value X or less, put it onto the battlefield, then shuffle.

Flying
Indulgence
Whenever you indulge, you may return target creature card from your graveyard to your hand.