Lightning Diadem
Enchantment — Aura
Enchant creature
When Lightning Diadem enters the battlefield, it deals 2 damage to any target.
Enchanted creature gets +2/+2.
"I fight for Keranos and for mortals. I see no contradiction."
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Rulings
Apr 26, 2014
If Lightning Diadem’s target is an illegal target when it tries to resolve, it won’t resolve and won’t enter the battlefield. Its triggered ability won’t trigger.