This issue is a variant of
John Carter, Warlord of Mars (Dynamite Entertainment, 2014 series) #13 [Cover A Casas].
There exist further variants:
- John Carter, Warlord of Mars (Dynamite Entertainment, 2014 series) #13 [Cover B Malsuni ]
- John Carter, Warlord of Mars (Dynamite Entertainment, 2014 series) #13 [Cover C Lupacchino]
- John Carter, Warlord of Mars (Dynamite Entertainment, 2014 series) #13 [Cover E Retailer Incentive Casas B&W]
- John Carter, Warlord of Mars (Dynamite Entertainment, 2014 series) #13 [Cover F Retailer Incentive Lau B&W]
- John Carter, Warlord of Mars (Dynamite Entertainment, 2014 series) #13 [Cover G Retailer Incentive Lupacchino 'Virgin Art']