The card Flash allows you to get a creature into play, but you have to either sacrifice it or play its mana cost
In the modern Yu-Gi-Oh
C Common Super Hippo Carnival X SPELL Quick-Play Special Summon 1 "Performapal Hip Hippo" from your hand, Deck, or Graveyard, then you can Special Summon as many "Hippo Tokens" (Beast-Type/EARTH/Level 1/ATK 0/DEF 0) as possible, but they cannot be Tributed, and monsters your opponent controls cannot target monsters for attacks for the rest of this turn, except "Hippo Tokens"
Commander land bases are usually where a lot of the monetary value of a Commander deck hides, and these decks mana bases are accordingly not terribly exciting
In that case you won't have a 3/3 creature on board, but your game will be saved
You might get a bunch of powerful creatures which can attack your opponent, but playing those creatures requires skill and strategy to establish the correct amount of playable mana