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Speaking of lands, the expensive ones are indeed expensive for a reason

Please Note:The card is not included

Instead of potentially jumping to $20 or $25, Courser will probably stay in the $12-$15 range even if it sees a lot of play

The spell has been created so that a player who decides to Enter the Infinite should have a turn to untap their mana and use all the cards they drew, but, ideally, you should just be able to cast Invasion of Tarkir on the same turn you cast Enter the Infinite

Or do what an increasing number of people do, and build an MTG Commander deck - it's a lot less painful to buy that mythic rare when you only need one copy.