Catalan

({p/u} can be paid with either {u} or 2 life.)

Flying, haste, wither (This deals damage to creatures in the form of -1/-1 counters.)

Whenever this creature deals combat damage
to a player, create a Weakness token under their control. (A Weakness token is a colorless enchantment that has: "Spells you cast cost {2} more
to cast" and "Whenever you cast a spell, exile this enchantment.")