An ideal mana curve favors cards that cost less mana to play, such as two to three, with cards requiring four, five, and six or more mana cards fewer in number
I only use Kiora's Follower and Bloom Tender due to their raw power and previously described interactions, but Priest of Titania and Devoted Druid (for its Necrotic Ooze upside) have some merit as well
The difference between a gem mint 10.0 card and a 9.0 graded card is dramatic
The halfling can only help cast legendary spells but prevents those spells from getting countered
Aggressive decks should run 2-3 rituals alongside standard mana rocks to deploy threats ahead of curve
And as you'll soon see, this card back not only looks good, it has a job to do during your games