If the creature you control is an illegal target, you won't put two +1/+1 counters on it even if you have delirium
Red spells often deal direct damage to targets or destroy artifacts and lands, while red creatures are quick and have high power, such as elementals, goblins, and most of all, fearsome dragons
Conspire Conspire is basically a replicate variant from Shadowmoor ,where you can tap two untapped creatures to make another copy of the spell
All of these cards can be cast for their front side casting cost, or the alternate More Than Meets The Eye cost, to have it enter the battlefield converted on its back side, similar to transforming effects found on many werewolf cards
Capturing the growth of a heroic journey and its trials with a gradually increasing mana investment is lovely, and its become the template for interesting creatures like Surge Engine
The indestructible it grants is very important, as it removes most of your opponents options for getting their commander back in the command zone