Phaserbeam,Lord of Elementals

Double Strike, Trample, indestructible
Phaserbeam, Lord of Elementals cant attack unless
you have{r}{g}{u} among elemental creatures you
control.Whenever Phaserbeam, Lord of elementals
deals combat damage to a player you may draw that
many cards if so then discard that many cards.
Whenever a land is put into a graveyard
Phaserbeam, Lord of elementals deals 1 damage to
any target