A copy effect copies everything written on the original, the results of any copy effects the original is currently subject to, and nothing else. The copy of Soul Warden won't have the Splinter Twin ability from the original.
December 7, 2014 10:51 p.m.
Negative. Splinter Twin gives the creature its enchanting the ability.
December 12, 2014 9:23 a.m.
However, A Soul Warden will prevent a lethal swing from a Deceiver Exarch as you gain +1 each new token.