Omastar

Islandwalk, unleash, haste
If Omastar has a +1/+1 counter, switch its power
and toughness.
Withdraw - When Omastar takes damage instead
remove a +1/+1 counter and tap it.
Shell Smash {r}{u/b} Place two +1/+1 counters on
Omastar. Omastar deals double damage to red creatures. Exile Omastar at your end step.