Story of the Seasons

Whenever a player adds white mana to their mana pool, that player's creatures gain vigilance until end of turn.Whenever a player adds blue mana to their mana pool, that player may draw a card.
Whenever a player adds black mana to their mana pool, all creatures get -1-1 until end of turn.
Whenever a player adds red mana to their mana pool, they may deal 3 damage to target creature or player.Whenever a player adds green mana to their mana pool, Put a 3/3 green elk creature token under that players control.