A creature that deals combat damage to a player must have a +1/+1 counter on it at the time damage is dealt in order for Haliya, Ascendant Cadet's last ability to trigger
The best sequence of actions would be to cast 2 Creatures in your 1st Main Phase, Convert into Prowl, Stoic Strategist, and then attack as a 5/5 Creature that can Exile up to 1 other tapped Creature or Vehicle
5 Teferi, Time Raveler Changed The Pace Of Play The War Of The Spark set focused heavily on the Planeswalker card type, printing a huge number and giving a great number of passive abilities in addition to their activated abilities
Fatal Push You can kill any 1- and 2-drop with Fatal Push, and it can do much more together with fetch lands or Blood tokens
It alters the base power/toughness of a creature, and brings it back, should it die this turn, albeit tapped