Leyline of Convergence

If Leyline of Convergence is in your starting hand
you may reveal it and put it onto the battlefield
At the begging of your upkeep choose one —
• Add one mana of any color to your mana pool
• Gain 5 life
• Scry 1
{bull} Target creature can't block this turn
{bull} Each opponent loses 1 life and you gain 1