Corgan Bourgeois's power is equal to the number of artifacts you control.
Whenever Corgan Bourgeois or another artifact enters the battlefield under your control, you gain 1 life.

Flash
Gulping Meqmaw's power is equal to the total number of permanents with flash you control and instant cards in your graveyard.
Whenever you cast a spell during an opponent's turn, mill two cards.

Vigilance
Leonin Phalanx's power is equal to your devotion to white.

Mass of Remains's power is equal to the total number of permanent cards you own in your graveyard and in exile.
Spellcharge 3

Monument to Might's power and toughness are each equal to the number of lands you control.
You may look at the top card of your library any time, and you may play lands from the top of your library.
Spellcharge 5

Flying, ward {1}
Parapet Awakener's power is equal to the number of creatures you control with flying.
{4}{U}: Create a 1/1 blue Gargoyle artifact creature token with flying for each nontoken creature you control with flying.

Trample
Petros's power is equal to your devotion to red.
Whenever Petros deals combat damage to a player, create an X/X colorless enchantment artifact creature token named Follower, where X is the amount of damage dealt.

Valley Caravan's power and toughness are each equal to the number of creatures you control.
Wander {3}{W}{W}
When Valley Caravan enters the battlefield, if it wandered, create a 1/1 white Human creature token.

As this permanent transforms into Vasilisa, Waging War, it becomes your choice of a 7/7 Hydra with trample, a 6/5 Kraken with hexproof, or a 5/6 Spider with vigilance, reach, and deathtouch.

Wildcourt Seeker's power and toughness are each equal to the number of land types among lands you control.
Whenever Wildcourt Seeker enters the battlefield or attacks, put up to one target land card from your graveyard onto the battlefield under your control.