Imperviousness?

Whenever an opponent casts a spell, counter that spell and put a depletion counter on this enchantment. If there are three or more depletion counters on this enchantment, sacrifice it. Cycling (, Discard this card: Draw a card.) When you cycle this card, you may counter target spell.

Equipped creature has shroud. (It can't be the target of spells or abilities.) Prevent all combat damage that would be dealt to equipped creature. Equip (: Attach to target creature you control. Equip only as a sorcery.)

Each player can't cast more than one spell each turn.

Flying You can't lose the game and your opponents can't win the game.

, Remove a counter from a permanent you control: Choose one — • Put a charge counter on target artifact. • Put a +1/+1 counter on target creature.

Equipped creature gets +2/+4 and loses flying. Prevent all noncombat damage that would be dealt to equipped creature. Equip (: Attach to target creature you control. Equip only as a sorcery.)