Arbol, First Mechanic

Equipment and enchantments cost {0} to equip to
any creature you control.
Any creatures that have Haste gain +4/+0 when
played until end of turn, and on your endstep
those creatures gain +0/+4 instead.
If a creature with Haste has an equipment
equipped, they also gain Lifelink.
You can cast Arbol, First Mechanic from any graveyard for {4}{u}{b}{r} and sacrifice a nonland permanent.