Gate of Azeroth

{t}: Add one mana of any color. If you control another gate, add 2 mana of any one color.
{3}{t}: Add a Portal counter and give target creature indestructible until end of turn. If
The Gate of Azeroth has 4 or more Portal counters on it, sacrifice it and draw two cards. Create three 3/3 Human Knight creature tokens with vigilance, first strike, or lifelink.