For the incredibly low cost of two mana, Sygg's two-mana activated ability can provide target Merfolk you control with protection from a color of your choice until the end of the turn
In all other zones, consider only the front face
Reunion of the House can return any combination of creature cards whose powers total 10 or less
On the flipside, taking a Fatal Push to clear a path for Deaths Shadow is sketchy because there are so many more cards that kill it
While no spacecraft currently rewards you for exceeding the number of counters it takes to make them into a creature, cards other than the spacecraft might benefit from getting tapped, like Kilo, Apogee Mind or Wylie Duke, Atiin Hero
5 Norns Choirmaster A 5/4 creature with flying and first strike for five mana is a solid body already, giving Norns Choirmaster a fair amount of control over the skies