Strength of Will (SPM-118) - Marvel's Spider-Man Wizards of the Coast Instant Rare null/null Until end of turn, target creature you control gains indestructible and "Whenever this creature is dealt damage, put that many +1/+1 counters on it." $1.87 You're $ away from free shipping
It gives you something excellent to do with your extra mana, growing at a more efficient pace then Figure of Destiny (if you actually have a deck full of Gods Willings and the like)
Heres an example using two of my decks that were mentioned earlier in the article: Xantcha, Sleeper Agent- Medium Power Casual: This deck seeks to get opponents to deal damage to each other
If the ability doesn't resolve (either for having its target become illegal or because a spell or ability counters it), the mode chosen for that instance of the ability still counts as being chosen
It's great in control builds, mono-black, it's another option for Aristocrats builds in this list, it's strong in many places