These are additional creatures that sometimes get pulled into the battle based on whats written on a card
When paired with low mana cost artifacts, and artifact lands, Frogmites mana cost can easily be reduced to zero, essentially allowing this Frog to function as a free-to-play 2/2 in eternal formats like Pauper .
Return to Action
The best sequence of actions would be to cast 2 Creatures in your 1st Main Phase, Convert into Prowl, Stoic Strategist, and then attack as a 5/5 Creature that can Exile up to 1 other tapped Creature or Vehicle
Cummulative Upkeep , an upgraded version of the 'upkeep' that we've seen on various cards before, also show up here -- a rather unpopular mechanic where the tax on maintaining your permanents increases each turn
Throne of Death also lets us draw a card at a small cost, but that's not a big deal