Flame of The Tyrant is the fourth pack rumored to be released in the game soon. This pack is filled with new monsters than there are spell/trap cards, putting some diversity into the game by adding more FIRE type cards that are quite strong and versatile, also more insect type monsters with high attack that can be summoned easily.
While this pack has good combinations with cards from the pack itself, it also further enhances the usability of older cards making it really good for the old experienced players.
With the new The Thing in the Crater and Flame Ruler, you can easily create some combos through special summoning and tribute summoning, most notably, to summon the Infernal Flame Emperor. With just those cards, you can summon a high attack monster that can immediately destroy 2 spell/trap cards in their field.
With cards like Legion the Fiend Jester, The Agent of Creation - Venus and Pinch Hopper, you can special summon or tribute summon much faster creating more possibilities using stronger high level cards. Not to mention the addition of two more level 4 monsters that can be counted as 2 tributes for FIRE and DARK type monsters.
There are some new cards that will make you want to think twice before wanting to attack with your monsters. Cards like The Golden Apples can turn the tide around very quickly by using your monster against you.
“Possessed Dark Soul”, against Standard Duelists Level 27, Brutality Lvl 3. The effect of this card makes the player take control of all the monster on the opponent’s field.
There are some other newer ways that might catch you off guard when you go against them. Cards like Warm Worm will make your opponent run out of cards while Gaia Soul the Combustible Collective can one shot you with either it's pure strength or with Riryoku to deal as good as a direct damage. This can lose you the game pretty quickly without you even knowing it.