Field Of Unchanging

Field Of Unchanging enters the battlefield tapped.
When Field Of Unchanging enters the battlefield each player may put two 1/1 white warrior creature tokens with vigilance onto their side of the battlefield.
{t}: Add {w} or {c} to your mana pool. If this mana was spent to cast a spell that would make a player gain 4 or more life, tap target creature.
{w}, {t}: Each opponent gains 2 life, create two 1/1 white warrior creature tokens.