Despite Icebow costing an additional power, I like it alongside Parry for a couple reasons. It buffs Blistersting Wasp out of Hailstorm and Torch range. It helps deal with sites both by giving +1 attack to a unit and by pinging sites directly. It can be bought back with Disjunction when needed.
In an unexpected twist for deadly tribal, I think the ramp from Auralian Merchant and the market access to Disjunction make it a better option than the extra deadly bodies of Kerendon Merchant.
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