Once Arixmethes is a creature again, it can attack on the same turn as long as you've controlled it since your most recent turn began
Samurai Katana Mana Value: 2R Rarity: Uncommon Type: Artifact Equipment Card Text: Choose a Job
Invasion of Tarkir Just savage Dragon-themed damage, Invasion of Tarkir might do very little damage on the front side, since we have to reveal Dragons to get extra damage after the first two
(Click to see it full sized!) They roughly align with my understanding of the metagame
It blocks and races well against any deck playing small creatures, and it survives most of the cheap burn spells in the format while also being able to trade up for bigger green creatures
It takes something much more ground shaking to have a card spike downwards in price, such as a reprint , a removal , or a realization