2019-07-12 : If the target of the reflexive triggered ability is an illegal target as that ability tries to resolve, it doesn’t resolve. You won’t gain 3 life.

2019-07-12 : Multiple instances of deathtouch and/or lifelink on the same creature are redundant.

2019-07-12 : Sorin’s second ability goes on the stack without a target. While that ability resolves, you may sacrifice a Vampire. When you do, the reflexive triggered ability triggers and you pick a target to be dealt damage. This is different from effects that say “If you do . . .” in that players may take actions after you’ve sacrificed the creature but before damage is dealt.