Trusted Pegasus

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Trusted Pegasus attacks, target attacking creature without flying gains flying until end of turn.

Serra's Guardian

Flying (This creature can't be blocked except by creatures with flying or reach.)
Vigilance (Attacking doesn't cause this creature to tap.)
Other creatures you control have vigilance.

Show of Valor

Target creature gets +2/+4 until end of turn.

Ironclad Krovod

Siege Mastodon

Prowling Caracal

Concordia Pegasus

Inspired Charge

Creatures you control get +2/+1 until end of turn.

Dawning Angel

Flying
When Dawning Angel enters, you gain 4 life.

Loyal Pegasus

Flying
Loyal Pegasus can't attack or block alone.

Plains

Pacifism

Enchant creature
Enchanted creature can't attack or block.

Haazda Officer

When Haazda Officer enters, target creature you control gets +1/+1 until end of turn.

Glaring Aegis

Enchant creature
When Glaring Aegis enters, tap target creature an opponent controls.
Enchanted creature gets +1/+3.

Inspiring Captain

When Inspiring Captain enters, creatures you control get +1/+1 until end of turn.