Blade of the Dunes

Equip {2}
Whenever equipped creature attacks and is blocked you may prevent all damage it would deal and be dealt this turn and remove it from combat. If you do put a dune counter on target land you control without a dune counter on it.
Whenever equipped creature attacks and isn't blocked it gets +X/+X until end of turn where X is the number of dune counters on lands you control.