The Silmaril

When the Silmaril enters the battlefield, draw 4
cards.
When this artifact enters the battlefield, choose 4 creatures you control, those creatures have vigilance, lifelink and reach, one of them also has indistructible. Put 3 +1/+1 counters on them.
When ever a creature recives damge, draw a card.
When ever you draw a card add a mana of any
colour
{1}{u}: Change one of the affected creatures.