Island Hopping

(A tactic can be a second commander.)
At the beginning of your end step, if an opponent had more creatures die of combat damage this turn than
you did, put an invasion counter on this Enchantment.
Remove One invasion counter from Island Hopping: Create an airbase token.
Sacrifice Island Hopping: Target opponent loses the game. Activate only as a sorcery and if there are 9 or more invasion counters in it.
The US hopped across the Pacific, taking islands one
at a time until they reached Japan.