Dazai Okou, Investigator

Haste, Avoid 3 (The first 3 damage that would be
dealt to this creature each turn is prevented.)
{0}: Once during each turn in which one or more
of your creatures attacked or blocked, Investigate.
Buki—{3}{u}{r}{t}: Create a legendary Energy
Sword equipment with "Equipped creature is
+5/+5 and has Double Strike, Hexproof and Vigilance. Equip {10}" and equip it to Dazai.