Buy OSRS Wild pie
The wild pie is a members-only food item in Old School RuneScape. It heals 22 Hitpoints in two bites, with each bite healing 11. It also boosts your Slayer level by 5, which is the highest Slayer boost in the game, and your Ranged level by 4.
The Slayer boost lets you kill Slayer monsters above your level. Players use wild pies to fight Skeletal wyverns, dust devils, abyssal demons, and other monsters needed for Achievement Diaries and clue scrolls. The boost does not let you get a Slayer task above your level from a Slayer Master.
An empty pie dish stays behind after you eat both bites. This makes wild pies a top pick for fighting the Chaos Elemental or Chaos Fanatic. The dish keeps your inventory full, so their special attacks cannot remove your worn gear.
Making a wild pie yourself takes level 85 Cooking. The pie uses raw bear meat, raw chompy, raw rabbit, and pastry dough, and it can burn even at high levels. Buying wild pies skips all that work. The item is tradeable, noteable, and almost weightless, so it is easy to stock up for long trips.