This is again played mostly in cEDH (for example Urza, Lord High Artificer decks) and, of course, Oldschool
It shouldnt be too difficult to swing in with a Dinosaur and cast multiple of its friends in the same turn to pull way ahead
Last but not least, Deathleaper is haste tribal in effect if not specifically in name, giving double strike to creatures who entered the battlefield this turn
The Reality Chip One of the best legendary artifacts in the game, once The Reality Chip is reconfigured to another creature, you can play cards from the top of your library, getting a good amount of card advantage every turn
Secondly, if you have two spare mana at the end of an opponents turn, hey, why not gain those two life