If you controlled a creature with power 4 or greater when you declared Ruby as an attacker, it doesn't matter whether you still control one as her triggered ability resolves
Vanille, Cheerful l'Cie (Extended Art) (FIN-475) - FINAL FANTASY Vanille, Cheerful l'Cie (Extended Art) (FIN-475) - FINAL FANTASY Wizards of the Coast When Vanille enters, mill two cards, then return a permanent card from your graveyard to your hand
1 Imodane, the Pyrohammer
Personally, I quickly replaced them with dice to track damage and Lore
Then snidely, after you have a handful of changelings in play, play Lilian's Contract, and laugh maniacally as they desperately attempt to kill your Rabid Wombat Pirate Minotaur Demons before your upkeep, only to hit them with an instant speed Kindred Summons bringing in a bunch more!!!
One-sided board wipes are incredibly powerful, and its often worth the extra two mana to keep your Creature alive