Shadowverse

Well, they usually provide a decent amount of neutral creatures. Yes, not like those pesky Lucifers with their backpacks, but you can definitely get a Mammoth.

You need to get them not only into your deck but also into your hand! Simultaneously with Sahai. Moreover, there's not that small a chance that you'll get Sword Maidens and Valkyrie Spears; these things simply win by sheer numbers. In general, the chance of playing this card well in the arena is noticeably less than 50%. I've never taken it, and, interestingly, in subsequent choices, it turned out that I was absolutely right.