Collector Boosters Horrify your opponents with Borderless, Double Exposure, Paranormal Frame treatments, Full-Art Manor lands, and Mirror Monster cards
You cast that copy during the resolution of the activated ability
However, even if you dont get full value by clearing your opponents board, you also gain a considerable amount of lore
If, during a player's declare attackers step, a creature that player controls that's been goaded is tapped, is affected by a spell or ability that says it can't attack, or hasn't been under that player's control continuously since the turn began (and doesn't have haste), then it doesn't attack
If youre playing him right, youll want to try and get at least 1 lore immediately when you play him
Getting your copies now is a smart move before the full decklist reveals send demand through the roof