Merfolk Spy
{U}
Creature -- Merfolk Rogue
1/1
Islandwalk (~this~ can't be blocked as long as defending player controls an Island.)
Whenever ~this~ deals combat damage to a player, that player reveals a card at random from their hand.
Wild Evocation
{5}{R}
Enchantment
At the beginning of each player's upkeep, that player reveals a card at random from their hand. If it's a land card, the player puts it onto the battlefield. Otherwise, the player casts it without paying its mana cost if able.