Greater Sandworm

Trample, Rythm-sense {3} (whenever a creature with even mana value, you may have this creature fight it, unless it’s controller pays {3})
Sacrifice a desert: Greater Sandworm gains hexproof and can’t be blocked this turn.
At the beginning of your end step, if Greater Sandworm is tapped and you control no deserts, sacrifice Greater Sandworm.