This card is a no-brainer for a deck like this, and should let us turn a few mana each turn into a couple more cards
What affects the value of Moltres
Also, that makes it an additional cost, not an alternative casting cost (in fact it states such explicitly right on the card), so Shared Discovery doesn't actually cost just one , it costs more , in the form of needing creatures already in play
You can make many tiny slivers and turn them into monsters with slivers like Sliver Legion, Necrotic Sliver, and Lavabelly Sliver
Fires decks could have a terrible time with the Cloak when it was on something as simple as a River Boa even when it wasn't going on something even larger like Rith, the Awakener, but Saproling Burst and Blastoderm caused compatibility issues