No, if you regenerate Kin-Tree Warden, he does not die. In Magic terms, dying means being put into the graveyard from play. Regeneration saves him from dying, so he is never put into the graveyard.
If, for some reason, your Kin-Tree Warden had flying or reach and you wanted to block, you would have 2 options (baring other external factors):
Option #1) Activate regenerate on the Warden, at any time you could play an instant, before the Combat Damage Step. In the Combat Damage Step, your Warden would be dealt the damage and deal its damage. Since the warden would have taken enough damage to be lethal, the regenerate effect would take place and instead of dying, it would be tapped and removed from combat. No other effects are triggered.
Option #2) Block without activating regenerate. Your Warden would die, triggering the Dictate and Ascendencys, causing each opponent to sacrifice 1 creature and putting 2 1/1 flying white spirit creature tokens onto the battlefield under your control.
As was said above, dying indicates being put into a graveyard. So, if your creature happens to get exiled, the abilities on the enchantments would not be triggered.
Abzan!
Modern
Life & Death
Commander
Elves
Liliana's Zombies
Butcher of the Horde
No, if you regenerate Kin-Tree Warden, he does not die. In Magic terms, dying means being put into the graveyard from play. Regeneration saves him from dying, so he is never put into the graveyard.
Abzan!
Modern
Life & Death
Commander
Elves
Liliana's Zombies
Abzan!
Modern
Life & Death
Commander
Elves
Liliana's Zombies
Option #1) Activate regenerate on the Warden, at any time you could play an instant, before the Combat Damage Step. In the Combat Damage Step, your Warden would be dealt the damage and deal its damage. Since the warden would have taken enough damage to be lethal, the regenerate effect would take place and instead of dying, it would be tapped and removed from combat. No other effects are triggered.
Option #2) Block without activating regenerate. Your Warden would die, triggering the Dictate and Ascendencys, causing each opponent to sacrifice 1 creature and putting 2 1/1 flying white spirit creature tokens onto the battlefield under your control.
As was said above, dying indicates being put into a graveyard. So, if your creature happens to get exiled, the abilities on the enchantments would not be triggered.
BWTokens
GCollected Stompany
BWGUSeance Insanity
URUR Bloo