Sandbar Crocodile

A 6/5 for five mana is an aggressive body for blue, a color that rarely gets stats this far above curve without paying for them somewhere on the card. Here the payment is phasing, and the cadence is the whole story: the Crocodile phases in or out during your untap step, so its existence alternates turn by turn. When it is phased out, the rules treat it as absent from the game entirely, so it slips under destruction and exile without ever leaving the battlefield, then returns later without summoning sickness because it was never a new permanent. The cost of that protection is that you control a real threat only half the time, and the half you do not is the half your opponent gets to develop around. The timing matters more than it first appears. Phasing happens on your untap, not after combat, so a Crocodile that is phased in to attack stays phased in through your opponent's entire turn, fully exposed to sorcery-speed removal when you can least afford to lose it. The protection window is the turn it is gone, not the turn it swings. That asymmetry is what makes the keyword a balancing lever rather than pure upside: phasing hands you a body well past the blue curve, then bills you in tempo and predictability every other untap step for the privilege of keeping it.