Flying
Apex of Night enters with six +1/+1 counters on it.
At the beginning of your upkeep, if Apex of Night has the greatest power among creatures or is tied for the greatest power, put a +1/+1 counter on it. Otherwise, remove two +1/+1 counters from it.

Inspired — Whenever Argus's Elite becomes untapped, creatures you control get +1/+0 until end of turn.

Flying
All damage that would be dealt to you is dealt to Athrix, the Bonded Heart instead.
Whenever Athrix is dealt damage, she deals that much damage to any other target.

This spell can't be countered.
Flying
When Aunor, Dragonsire or another Dragon you control enters, untap target land. That land becomes a 5/5 Dragon creature with flying and haste in addition to its other types.

If you would create one or more tokens, create an additional Treasure token.
If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on that creature instead.

Vigilance, trample
When Crystal Lion enters, crystallize.

Flash
Flying
When Cunning Skylord enters, each player draws a card.
{W}, Discard a card: You gain 4 life.
{U}, Discard a card: Exile Cunning Skylord until the beginning of the next end step.

Enchant player
At the beginning of enchanted player's upkeep, they mill cards until they mill a land card.
At the beginning of each end step, if enchanted player milled four or more cards this turn, create a 2/2 blue and black Zombie creature token with defender.

Choose one —
• Destroy all creatures.
• Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.

Each player exiles all enchantment cards from their graveyard, then sacrifices all enchantments they control, then puts all cards they exiled this way onto the battlefield.

When Elseworld Explorer dies, if there's an enchantment card in your graveyard, you gain 2 life and create a 1/1 white Spirit creature token with flying.

Flying, trample
Whenever Emerald Hide Wyrmling or another Dragon you control enters, crystallize.

Target player mills three cards. Target creature gets -X/-X until end of turn, where X is the greatest number of cards in any graveyard.

Sacrifice another artifact or creature: Gau, Igneate King gets +1/+1 until end of turn. If this is the second time you've activated this ability this turn, he also gains indestructible until end of turn. If this is the third time, he also gains double strike until end of turn.

Menace
Sacrifice Gau's Fanatic and another artifact or creature: Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery.

At the beginning of your draw step, draw a card.
You may play an additional land card during each of your turns.

[+1]: Gozani, Dreadlaugh Hunter deals 2 damage to each opponent. Mill two cards.
[–3]: Create an X/X black Hyena creature token with haste, where X is the number of different card types among cards in your graveyard.
[–4]: You get an emblem with “You may play Gozani planeswalkers from your graveyard.”

Target player sacrifices a creature. Gruesome Demise deals damage to each opponent equal to the sacrificed creature's power.

[+2]: Create a colorless Map artifact token with “{2}, {T}, Sacrifice this artifact: Search your library for a land card, reveal it, put it into your hand, then shuffle.”
[–2]: Create a 1/1 white Nomad creature token with “Whenever a land you control enters, put a +1/+1 counter on this creature.”
[–8]: Destroy any number of target noncreature permanents with different names.
[–8]: [super sweet ultimate]

At the beginning of your upkeep, each opponent discards a card if you control the creature with the greatest power or tied for the greatest power. Otherwise, crystallize.

{T}: Target player mills two cards.
{T}: Add one mana of any color. Spend this mana only to cast spells from your graveyard or activate abilities of cards in your graveyard.

Lifelink
Whenever an enchantment you control enters or an enchantment you control is put into your graveyard from the battlefield, each opponent loses 1 life and you gain 1 life.

Flying
When Nesting Hellkite enters, create an 0/1 green Egg creature token with defender and “When this creature dies, reveal cards from the top of your library until you reveal a Dragon creature card. Put that card onto the battlefield and the rest on the bottom of your library in a random order.”

Menace

Draw two cards. You may put a land card from your hand onto the battlefield.