This Oath of the Gatewatch (2016) uncommon was a source of a lot of speculation on whether it could be good, but in the end, the probability of having a Card not found by turn two was just way too small for it make any actual waves
Another perfect example of this is Isshin, Two Heavens As One, which reads: "If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time." This is an incredible ability to have on a commander - and building a Commander deck around it is sure to be a blast - but in a Standard set it just feels off
This order could matter if you tap Millikin for mana, for example, to pay for a library ninjutsu ability
You can use Lure cards for a similar effect
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Some of the strongest cards the game has seen since launch have made their way into the card pool, bringing unexpected combinations and new features to colors that haven't seen them before