Saviour's Blade

When Saviour's Blade enters the battlefield, secretly choose a creature you control. When that creature dies, if Saviour's blade isn't attached to it, return it to the battlefield attached to Saviour's Blade.
Equipped creature gets +3/+0 and has lifelink.
Equip {3} ({3}: Attach this permanent to target creature you control. Activate this ability only any
time you could cast a sorcery.)