For one green mana, tapping Dawnstrider, and discarding a card from your hand, Dawnstrider can prevent all combat damage that would be dealt during a turn
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I fear that these unnamed mechanics are being treated as more disposable than named mechanicsthey dont have to pull the same weight that Escape, Food, and Proliferate do, so its acceptable for them to not work as well
The card makes both players shuffle their hands into their deck and draw cards equal to their remaining Prize cards
Your seven-mana investment does net an on curve 7/7 with four keywords
Anyway, you need ways to discard that cost 2 mana or less so if you cant find the other cards, its an option