Hoarder's Overflow [Bloomburrow]

Set: Bloomburrow Type: Enchantment Rarity: Uncommon Cost: {1}{R} When Hoarder's Overflow enters and whenever you expend 4, put a stash counter on it. (You expend 4 as you spend your fourth total mana to cast spells during a turn.){1}{R}, Sacrifice Hoarder's Overflow: Discard your hand, then draw cards equal to the number of stash counters on Hoarder's Overflow.