Bulwark of revenge was removed from RuneScape after an update, but still exists in-game for those who had obtained it.
A bulwark of revenge is a shield that can be obtained from collecting rose petals and crushing 200 of them. Its "Love" counterpart is the aegis of devotion. It has 6 tiers of level requirements to wield. The level of the shield can be switched by right-clicking when unequipped and selecting "Change level".
It can be reclaimed from Diango for 25,000 coins if lost or destroyed.
It is also available in the 2016 event for 100 Valentine's petals.