If another creature is entering the battlefield at the same time as Towering Titan, its toughness won't contribute to the +1/+1 counters on Towering Titan
I could probably split each of these tiers into two or three more if I wanted to
Theres a deck in Limited and Constructed that can take advantage of this cost reduction, but towns are like clunky guildgates, and most of them enter tapped
Kit Cloudkicker Spunky Bear Cub & Navigator Sapphire Kit Cloudkicker seems pretty strong, possessing Ward even as a one-cost character and then questing for three lore for only a Shift 3
For starters, there are tons of cards in MTG that let you put additional lands into play each turn
Its attack trigger lets you draw a card for each attacking Dragon and then put any permanent from your hand directly onto the battlefield for free, creating an avalanche of value that is nearly impossible to come back from