Trample

Altar Golem's power and toughness are each equal to the number of creatures on the battlefield.

Altar Golem doesn't untap during your untap step.

Tap five untapped creatures you control: Untap Altar Golem.

Crusader of Odric's power and toughness are each equal to the number of creatures you control.

Vigilance

Geist-Honored Monk's power and toughness are each equal to the number of creatures you control.

When Geist-Honored Monk enters the battlefield, create two 1/1 white Spirit creature tokens with flying.

At the beginning of your upkeep, if you control four or more creatures, transform Hanweir Militia Captain.

Westvale Cult Leader's power and toughness are each equal to the number of creatures you control.

At the beginning of your end step, create a 1/1 white and black Human Cleric creature token.

Majestic Myriarch's power and toughness are each equal to twice the number of creatures you control.

At the beginning of each combat, Majestic Myriarch gains flying until end of turn if you control a creature with flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Scion of the Wild's power and toughness are each equal to the number of creatures you control.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Flying

Seraph of the Masses's power and toughness are each equal to the number of creatures you control.

Flying, vigilance

Silverwing Squadron's power and toughness are each equal to the number of creatures you control.

Whenever Silverwing Squadron attacks, create a number of 2/2 white Knight creature tokens with vigilance equal to the number of opponents you have.

Veteran Warleader's power and toughness are each equal to the number of creatures you control.

Tap another untapped Ally you control: Veteran Warleader gains your choice of first strike, vigilance, or trample until end of turn.

Whenever an opponent casts a spell during your turn or when Voice of Resurgence dies, create a green and white Elemental creature token with "This creature's power and toughness are each equal to the number of creatures you control."

Wayfaring Temple's power and toughness are each equal to the number of creatures you control.

Whenever Wayfaring Temple deals combat damage to a player, populate. (Create a token that's a copy of a creature token you control.)