You can only get cards in packs or by buying them from someone who cracked a pack -- that's it
As such, if you want Standard-legal flash, buy the appropriate Core Set 2021 theme boosters
1 Tymna The Weaver Life Is Just A Resource Not just a powerful lifelink creature, but one of the most powerful and popular commanders around, Tymna the Weaver is a little white and black creature that comes with both lifelink and a very strong ability that utilizes your life as a resource
That gives this a very strong early game, especially compared to others
If its a creature, you even get to swing with it right awaythough it vanishes at the end of turn
Im not a fan of mulliganing to a Convoker your average hand (by this I mean a chance to cast a Convoker on turn three if you have it or happen to topdeck it) should be competitive against most of the decks in the format