The ideal is getting use out of your ability-laden creatures first from Odric, Lunarch Marshal, trigger Kathril, then use Soulflayer, but where's the card draw to help you get there
Tapping her to play Merlin Crab can make him 6/3 with Rush, letting you snipe a troublesome character
Synapse Sliver solves that problem by giving every sliver the potential to draw cards if they deal combat damage to a player
The original Computer Search (BW) remains expensive ($40+) because it is legal in the Expanded format and essential for competitive play there
When I first looked at the list of cards that came in the League Battle Deck, I was positively surprised to see how many good things were included
So if you have another copy in your hand, you effectively have a dead card that probably shouldn't be played while the other is out