how many cards are in a deck in yugioh Early Yu-Gi-Oh! Lesser Seen Decks: Umi Beatdown Yugi-Kaiba Format | by Old School Yu-Gi-Oh! Could someone please tell me

The mechanics obviously follow

Once that happens, one player unfortunately loses all their creatures to you

Metal Core Barrier: Provides a massive 50 damage reduction for one turn, making it ideal for keeping Mega Mawile alive

If the blue player in your playgroup wont let you be a Timmy and just play your big beefy boys, you can at least replace them

(2021-03-19) If multiple sources would deal damage to an affected target at once, that target or that target's controller chooses which source's damage to prevent for each "shield." (2021-03-19) If multiple replacement effects apply to a player or permanent being dealt damage, that player or the controller of that permanent chooses the order to apply them, not the controller of the source of damage

A typical ratio is 50% Monster, 30% Spell, and 20% Trap cards, adjusted for your playstyle