Lightning Serpent

Flying Lifelink (Damage dealt by this creature also causes you to gain that much life.) Pegasus creatures you control have lifelink. Constellation — Whenever an enchantment you control enters, create a 2/2 white Pegasus creature token with flying.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.

When Gadwick enters, draw X cards. Whenever you cast a blue spell, tap target nonland permanent an opponent controls.

Flying This creature enters with two -1/-1 counters on it. B, Remove a -1/-1 counter from this creature: Put a -1/-1 counter on each other creature.

Draw three cards. Target player mills three cards.

Return target creature card from your graveyard to the battlefield. It gains haste until your next turn.

Whenever this creature attacks, you draw a card and you lose 1 life.

When this creature enters, it deals damage to each opponent equal to your devotion to red. (Each R in the mana costs of permanents you control counts toward your devotion to red.)