King, The Bog Frog

Whenever an opponent casts a spell, you may create a 1/1 green frog token, unless that player pays {1}. Whenever a player casts a nonland permanent spell, you may sacrifice 3 frogs, then roll a d6. Resolve the rolled result. 1: Counter this ability. 2: The played spell becomes a colorless land. 3: The played spell becomes a 1/1 green frog creature. 4: The played spell becomes an enchantment. 5: Return that spell to its owner’s hand. Draw a card. 6: Exile that spell. Each player may cast a copy of it without paying its mana cost.