v0.64.150 - Core Set Changes

Captain Washburn (and future units with Immortal) can no longer be copied.

• Core Set Changes -  Our philosophy is that core set cards shouldn’t be meta staples.
• Explosive Incantation: Now 5 mana / 2 Ticks
• Westwind Channeler: Now 3 mana 1/2 in Spirit. We believe mana ramp makes more flavor sense in Spirit, given its association with nature and growth.
• Bug Fixes:
• Fixed crash when trying to draw negative cards
• Fixed crash when trying to access a zone belonging to a non-player