Timshaw, Acolyte of Sobek

Swampwalking
When Timshaw, Acolyte of Sobek attacks you may put a -1/-1 counter on it and it gains double strike till end of turn.
When Timshaw, Acolyte of Sobek deals combat damage to a player put a +1/+1 counter on it.
"Where I am from we either fight the children of Sobek or train others to do it."