Beacons of Energy

When Beacons of Energy enters the battlefield
draw a card.
{t}: add {u} or {w} to your mana pool, this mana
may only be used to cast noncreature spells.
Sacrifice Beacon of Energy: Draw a card, you may
only activate this at sorcery speed.
'keeps the power on at night without ruining the
view of the sky' - Eduan, Flash King