Against the blue decks you generally want to save it for their end step, against the aggro decks you want to combat step it, while against the midrange decks its often best used in the upkeep just to tap down lands (Tron literally cant interact at anything other than Sorcery speed)
Appa, Steadfast Guardian's Value in MTG $55.53 for a Borderless foil version $39.32 for Borderless non-foil $24.85 for regular non-foil 8 8 - Ozai, the Phoenix King Ozai, the Phoenix King is a Rakdos card in MTG that costs 6 mana total (2 generic, 2 Black, 2 Red) for a 7/7 creature with trample, haste, and firebending 4
"You've talked in the past about how R&D is trying to reduce the amount of shuffling because of the "loading time" it adds to games."
While Rest in Peace is on the battlefield, abilities that trigger whenever a creature dies won't trigger because cards and tokens are never put into a player's graveyard