Parallels are essentially rarer versions of a characters card, with the same stats but alternate art
With this set up all we need to do is gain a life (which usually means have a creature enter the battlefield to trigger the Soul Sister) and we'll start the combo with Heloid triggering to put a +1/+1 counter on Scurry Oak which will make a 1/1 Squirrel token which will trigger the Soul Sister to gain us a life, which will trigger Heliod again to start the loop over
Instant Color tag templates(None) Foil You may discard an Island card and another card rather than pay this spell's mana cost
Even if you wanted to play a standard game with this, the only fun part is mixing 3 differnet decks of your choice together, but the unfun part is the lack of good cards to pull you into the game
All the additional costs require mana, but I cant see any hard reason for this restriction in future designs
Azusa, Lost but Seeking is a three-mana 1/2