Alveron Sniper

Cover {1}{w} (You may cast this for its cover cost. If
you do, it enters the battlefield attached to target land
you control. It cannot attack or block while in cover. Sacrifice it if the land it is attached to leaves play. You
may unattach it any time you could cast a sorcery by
paying its mana cost.)
{t}: Alveron Sniper deals 1 damage to target
attacking or blocking creature. Use this ability
only if it is in cover.