Windcrag Siege fits in famously, and with Firebender Ascension it's only the trigger from the attacking creature, but it counts
The card draw that this card provides is very important especially since it is an essential card in midrange and control decks The -7 ability, though it may be hard to even get close to, is a gamechanger and it can guarantee your win outright
Protection Galadhrim Ambush is an amazing instant spell that creates X 1/1 green Elf Warrior creature tokens, where X is the number of attacking creatures and in addition it prevents all combat damage that would be dealt this turn by non-Elf creatures
In order to make Hydras the best they can possibly be, you're going to need a lot of mana, and that's what Somberwald Sage and Rosheen are here to supply
As you get to cast it twice and as each half provides you with a suitably annoying board presence that you generally have to deal with it you can fairly easily turn Lingering Souls into a two for one at worst
Flavor Text A fight put off forever is already won