Hellbent — As long as you have no cards in hand, Sliver creatures you control have "{T}: This creature deals 1 damage to target player or planeswalker."

All Slivers have "{T}: Add one mana of any color."

All Sliver creatures have trample.

All Sliver creatures get +1/+1.

Sliver creatures you control get +1/+1.

Sliver creatures you control have vigilance. (Attacking doesn't cause them to tap.)

All Sliver creatures have flanking. (Whenever a creature without flanking blocks a Sliver, the blocking creature gets -1/-1 until end of turn.)

All Sliver creatures get +1/+1.

All Sliver creatures have reach.

While an opponent is choosing targets as part of casting a spell they control or activating an ability they control, that player must choose at least one Flagbearer on the battlefield if able.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {G} or {W}.

({T}: Add {G}.)

({T}: Add {R}.)