Once you take this action, you may cast that card if it's legal to do so before any other player can take actions
So, if you're searching your library for a land card, you can't find a modal double-faced card whose front face isn't a land card
5 Agatha Of The Vile Cauldron Wilds Of Eldraine Agatha is a super-cheap Commander, costing just two mana, and she reduces the cost of activated abilities of creatures you control by X, where X is her power
Small creatures can sneak through and activate the ninjutsu Satoru give your creatures while providing added value with its come into play effects
Sunlance is also better than Oust against creatures with EtB effects
A 1 in 6 chance of opening the best limited common, combined with a decently powered set helps put it in the A category