Dragon Scales

Enchant creature
Enchanted creature gets +1/+2 and has vigilance.
When a creature with mana value 6 or greater enters, you may return Dragon Scales from your graveyard to the battlefield attached to that creature.

Piety Charm

Choose one —
• Destroy target Aura attached to a creature.
• Target Soldier creature gets +2/+2 until end of turn.
• Creatures you control gain vigilance until end of turn.

Vigilance

Enchant creature
Enchanted creature has vigilance. (Attacking doesn't cause it to tap.)

Serra's Blessing

Creatures you control have vigilance. (Attacking doesn't cause them to tap.)

Eternal Warrior

Enchant creature
Enchanted creature has vigilance.

Stamina

Enchant creature
Enchanted creature has vigilance.
Sacrifice Stamina: Regenerate enchanted creature.