Shockwave

• Deal 2 damage to target opponent and any
creatures they control.
• Until your end phase, permanents you control
gain Indestructible and Shroud.
• Creatures that aren't destroyed by this card gain
-1/-1 until their controller's end phase.
{bull} For each copy of Shockwave in your graveyard,
reduce the cost of Arbiter spells you own by {1}