pokemon trading card game walkthrough Reference Guide: Pokémon Core Mechanics & Objectives Review - The Official Pokemon

Each of these decks come with a complete 100-card Commander deck based around one of the factions of the game

Whenever another creature you control enters, this creature deals damage equal to that creature's power to any target

I dont think that were likely to see Sythis reprinted too soon, especially in the Showcase frame, so these should be safe for a little while

To compare Jump-start to Flashback, Flashback is usually about card advantage, where you pay a minimal premium up-front and then later get a second (usually overcosted) spell for free

It can significantly ward off attacks from a couple of 2/1s but the range and value of what attacks it wards off are not that extensive

Third, see if you can find lands that cover more than one of your colors (especially if they can enter untapped)