Disa Hanido and Doorey

Mechs you control get +1/+1
When a nontoken mech enters the battlefield under your control you may pay {2}
if it has power of 3 or less, or pay {4} if it has a
power of 4 or greater, create a copy of that
mech.
{1}{w}{u}: Target creature gains lifelink until
end of turn.