Tribute to the World Tree is helpful as well, playing into the +1/+1 counter theme and bolstering the power of the rest of your small creatures
the former earn you coins you can then use on boosters, while the latter can be used to create or clone cards to fill a deck rather than chancing it with booster packs
I respect it - but I also begrudgingly look at this release slate and conclude Wizards of the Coast is going to leave this expansion with unfinished business as far as Final Fantasy goes
Due to effect of the second ability of Kagemaro, First to Suffer creature enchanted with Spirit Mantle will get -X/-X and can easily go to the graveyard, if X is high enough to decrease its toughness to 0 or lower
Devoid applies in all zones, so, for example, if an effect referred to colorless cards in your library or graveyard, cards with devoid would count