Shardless Agent

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)

倾曳（当你施放此咒语时，从你的牌库顶开始放逐牌，直到你放逐一张费用比此咒语低的非地牌为止。你可以施放该牌，且不需支付其法术力费用。将所放逐的牌以随机顺序置于牌库底。）