Equipped creature has
lifelink (Damage dealt by the creature also causes its controller to gain that much life.).
As long as you have 30 or more life, equipped creature gets +5/+5 and has
indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.) and "Prevent all damage that would be dealt to this creature."
Equip 
(
: Attach to target creature you control. Equip only as a sorcery. This card enters unattached and stays on the battlefield if the creature leaves.)