Suikoden II Edit
Debuting in Suikoden II under the name Draining Rune, the Drain Rune allows its user to heal HP when delivering a critical hit.
Suikoden III Edit
Heals 33% of HP from critical hits.
Suikoden IV Edit
Healed when dealing a critical hit.
Suikoden V Edit
A rune that recovers 10% of damage dealt as HP.
Suikoden Tactics Edit
Heals 30% of HP when bearer strikes a critical-hit.