It is incredibly easy to make a proxy or playtest cards essentially for free
Merfolk Trickster helps in the early game, tapping down an attacker to keep our life total high along with killing things like Karn, Scion of Urza tokens
A huge monster that hits hard, it presumably hits once, dies, and then becomes the Lightning
These limited card pools help serve specific strategies, so instead of just drawing from fewer cards that are still completely random, secret packs are each tailored to useful combinations
8 Steel Seraph This artificial angel comes with an alternate casting cost through prototype, losing a bit of its overall strength but giving it the flexibility to put pressure on your opponent earlier in the game
Designed for EDH & casual play