Oathbreaker, Blade of Dalinar

Equipped creature has +5/-2 trample and menace 3 (creature is unblockable by less than 3 creatures).
Equipped creature has hexproof and indestructible if it’s owner has 20 or more creatures.
Equip creature {4}
If equipped creature is not legendary, then it dies at the beginning of it’s owner’s next upkeep.