Borrelsword Dragon

Flying, Indestructible, Haste
As you cast this card, sacrifice this card unless
you sacrifice 4 creatures, if you do, make this creature’s base toughness 6.
{u}{2}: Target creature becomes an equipment equipped to this creature with the ability, “equipped creature gets +2/+2,” and if you do
this creature gains double strike until the end
of the turn.
When this card leaves the field, send all equipments equipped to this card to the graveyard.