Pyra, False Aegis

Pyra, False Aegis can be your commander.
Partner.
Blade - If partnered with another commander,
add this card's attack to the other commander.
This card can't attack while the other commander
is on the battlefield.
{t}{r} - Deal 1 damage to target creature.
When your HP drops below 75% of the starting
HP, replace this card with Mythra, The Aegis.