Karns Bastion is a little costly to do the job, but the fact its a land that can produce mana in the early game helps make up for that, especially because it can become a real engine late
Two Heads Cuter Than One If a single anthropomorphized critter depicted on a Bloomburrow card is cute, then combining multiple species on the same card, shown working together, is downright delightful
Lands Lands represent the locations you control, and which you draw magical energy (mana) from
Clan Defiance It may not look sexy, but Clan Defiance is the best X damage spell in Gruul, and better than most Red options with its ability to shoot down two creatures as well as Blaze an opponent
If an attacking creature loses haste, perhaps because Fervor leaves the battlefield after attackers have been declared, it won't be removed from combat
There aren't many ways to bring permanents back from the graveyard once they're removed, so once something is gone, it's likely gone for good