With Adrians trigger on the stack, tap the rocks for mana
With both Ctan bringing some hefty, potentially game ending abilities to the battlefield
There are a number of resources out there that allow you to plug in your decklist and get a breakdown of what percentage of your cards need specific colors of mana, what the average converted mana cost of your cards is, and other helpful information (Im partial to Tapped Out personally)
Adventures in the Forgotten Realms TypeLegendary Creature Dragon God Collector Number235 Raritymythic ArtistChris Rahn Flying When Tiamat enters, if you cast it, search your library for up to five Dragon cards not named Tiamat that each have different names, reveal them, put them into your hand, then shuffle
One mana, counter something somewhat specific but broad enough
At the beginning of your end step, remove a time counter from it.) Whenever Overlord of the Boilerbilges enters or attacks, it deals 4 damage to any target