Once your end step begins, it's too late to put a counter on a creature in order to cause this ability to trigger
Ultros, Obnoxious Octopus Ultros has too many teeth (though thats accurate to the games), and is a great card for limited with letting your midrange spells ice opposing creatures, while the 8 mana thing left to the realm of casual play in large

$1.49 Balthier and Fran (0393 - Borderless) Final Fantasy Variants $0.35 Gohn, Town of Ruin Final Fantasy $6.99 Golbez, Crystal Collector (0395 - Borderless) Final Fantasy Variants $0.49 Vanille, Cheerful l'Cie (0392 - Borderless) Final Fantasy Variants $1.99 Raubahn, Bull of Ala Mhigo (0388 - Borderless) Final Fantasy Variants $9.99 Emet-Selch, Unsundered (0394 - Borderless) Final Fantasy Variants $0.35 Rabanastre, Royal City Final Fantasy $2.99 Firion, Wild Rose Warrior (0386 - Borderless) Final Fantasy Variants $3.99 Hope Estheim (0396 - Borderless) Final Fantasy Variants $8.99 Joshua, Phoenix's Dominant (0397 - Borderless) Final Fantasy Variants $6.99 Jill, Shiva's Dominant (0378 - Borderless) Final Fantasy Variants $5.99 Zenos yae Galvus (0384 - Borderless) Final Fantasy Variants 0 results found
Sacrifice after III.) I Mill five cards
Media Lab Books released The Game Master's Book of Magic and Mayhem for Kids, and Kyle gives it five out of five stars