I honestly can't make heads and tails of the flavor of this mechanic
Put the revealed card into your hand and Tempest Efreet from anywhere into that player's graveyard
If they werent currently restricted, those two would undoubtedly top these One Piece Card Game rankings
And in comparison to a jumbo Pokmon card, the invitation are just a tad smaller, ~5x7
Its a ton of pressure, but you can race with flyers or stall the 2/3s until you find removal for Ashiok
The high mana and equip cost also mean that, in most cases, Cloak is a highly telegraphed move , and most people will opt to run Greaves for the much better mana economy, or Boots for hexproof over shroud