Toxic Container

Before the game starts construct a pile of 5
cards that share a colour with this fridge they
will remain under it until the fridge is checked.
At the beginning of your upkeep if CaseOH!
is on the battlefield you may choose to skip your
draw step if you do search your library for
three land cards and put them into your hand.
Whenever a land enters the battlefield under
your control, check the fridge.