The Pillar of Tentacles

When The Pillar of Tentacles enters the battlefield create three 1/1 black tentacle creature tokens, and then you may pay X life and put that many charge counters on The Pillar of Tentacles.
{2}{t} Gain 3 life.
{3}{t} Add X mana of any one color, where X is how many charge counters are on The Pillar of Tentacles.