Founding of the Dragon Knights

When this permanent enters the battlefield,
reveal a legendary artifact from your library
that costs 4 or more mana and exile it. Once per turn, you can pay {x} mana to reveal and exile
an equipment from your library that costs {x} or less mana. You can exile this permanent
by paying the mana cost of the highest
mana cost equipment exiled by this card
to equip all cards exiled with this permanents
effect to a target creature you control.