Indestructible
As long as your devotion to green and blue is less than seven, Kruphix isn't a creature.
Whenever you tap a permanent for mana, add one mana of any type that permanent produced.

When Leyrune Collector enters, look at the top four cards of your library. You may reveal an artifact or land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. If you revealed a land this way, you may put a land card from your hand onto the battlefield tapped.
Wander {3}{G}{U}

Enchant land you control
Enchanted land is a 2/2 Elemental creature with vigilance, haste, and “{T}: Add two mana of different colors.” It's still a land.
If enchanted land would leave the battlefield, instead sacrifice Manifest the Lightveins and that land gains indestructible until end of turn.

When Moving Mountains enters, search your library for a land card, put it onto the battlefield tapped, then shuffle.
If a Ruin you control would stop being a creature, it becomes a creature in addition to its other types for as long as you control Moving Mountains.

Mykian, Pop Paragon enters with a +1/+1 counter on it for each color of mana spent to cast it.
Remove two counters from Mykian: Draw two cards.

When Nocturne, Monstrous Krasis enters and at the beginning of your upkeep, put X +1/+1 counters on Nocturne, where X is the number of different kinds of counters on permanents you control.

Nykthos, Architect of Gods has indestructible as long as you control at least three Shrines.
Whenever Nykthos attacks, you may pay {W}{U}{B}{R}{G}. If you do, search your library for a Shrine or legendary land card, put it onto the battlefield, then shuffle.

This spell costs {1} less to cast for each counter among permanents you control.
Ward {2}

Untap target non-Assembly-Worker artifact. Put a charge counter on it.

Trample
Amity — Whenever you attack with Puddle Crasher and exactly one other creature, look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Tap up to two target nonland permanents. They lose all abilities until your next turn.

Trample
Ruin, the First Shard enters with a +1/+1 counter on it for each mana spent to cast it.

Vigilance
Whenever you cast a spell from anywhere other than your hand, put a +1/+1 counter on Shepherd of Steel.
When Shepherd of Steel dies, put its counters on target creature you control.

At the beginning of combat on your turn, up to one target Shrine you control becomes a creature in addition to its other types with base power and toughness 3/3 until end of turn. If you control three or more Shrines, it has base power and toughness 6/6 instead.

Whenever a token you control enters, put a +1/+1, flying, haste, trample, vigilance, or loyalty counter on a permanent you control other than Simul.
[+1]: Create a 1/1 green Plant creature token.
[–2]: Create a blue Aura enchantment token with enchant permanent and “When enchanted permanent dies, you draw two cards.”
[–5]: Create a 3/3 green, blue, and red Dragon creature token with flying. For each kind of counter on permanents you control, you may put a counter of that kind on it.

Flying
When Skylance Escort enters, put a vigilance counter on each creature you control.

When Towering Sentinel enters, for each kind of counter among permanents you control, put a counter of that kind on Towering Sentinel, then add {G} or {U}.

Workshop Helper enters with a +1/+1 counter on it.
{T}: Move a counter from target creature you control onto another target creature. Activate only as a sorcery.

{T}: Add {C}{C}.
Whenever you cast a Kraken, Leviathan, Octopus, or Serpent spell, draw a card.

{W}, Exile an artifact or enchantment card from your graveyard: You gain 3 life.
{2}{U}, Exile an instant or sorcery card from your graveyard: Draw a card.
{4}{B}, Exile a creature or planeswalker card from your graveyard: Create a tapped 0/0 colorless Robot artifact creature token with three +1/+1 counters on it.

When Codename: Spyder enters, mill three cards.
Whenever one or more cards are put into your graveyard from your library, you may return up to one of those cards to your hand. Do this only once each turn.

When Reconnaissance Agent enters, you may choose one —
• Exile target card from your graveyard.
• Exile another target creature.
When Reconnaissance Agent leaves the battlefield, return the exiled card to its owner's hand.

As an additional cost to cast this spell, exile X cards from your graveyard.
You draw X cards and gain X life, then each opponent loses X life.

If you would draw a card while your library has no cards in it, instead you may put a card you own from outside the game into your hand.
{T}: Draw two cards, then discard a card.

Choose up to one for each color among white, blue, and black among permanents you control.
• Return target artifact or enchantment card from your graveyard to your hand.
• Return target instant or sorcery card from your graveyard to your hand.
• Return target creature or planeswalker card from your graveyard to your hand.
Exile Tiril Agenda.