When an elemental incarnation (for example emptiness) is convoked (using eridu) for its evoke cost using a white black creature it is unable to activate one of its modes (in the case of emptiness at least its black mode and maybe its white, though I have not tested it with white). This caused me to lose a game in the arena direct and I would like a refund of my arena direct or to be afforded a win for my last game. My opponent had 2 life and I had eridu, a great forest druid, and a reaping willow on my board. The eridu and great forrest druid did not have summoning sickness. My opponent had 1 flying blocker (a 2/2 merrow skyswimmer). I played the emptiness and paid 2b for emptinesss and neither ability triggered. I then lost the game because I did not have lethal.