For the last two abilities, you choose the sector as the ability resolves
Besides the obvious 1 drop mana dorks and Rofelos there is a lot that can be done with elves - like tokens (the tokens do not even have to be elves if you want to be sneaky about them being a tribe) Elves also has some really good utility creatures, and some strange ones as well if you want to try something new Hunting triad plays really well with bramblewood paragon btw either spawning six power or by enlargening your big guy and giving him unexpected trample
There are options outside of monowhite, too
That's usually enough to take that player from possible first place to last or dead, though this Dragon's admittedly mopey if you're at the highest life total
Regardless of what Reddit will say, the US fraught colonial history of relegating and governing indigenous peoples according to federally recognised tribes - along with its cultural ties to images of primitive, naive and sometimes savage life - provides plenty of reason to switch to something like Kindred
In theory, you could also protect the lands that you Earthbend, but the ability does have built-in protection