Calamity Beasts are a new cycle of creature cards in Magic: The Gathering that possess unique and powerful abilities, making them valuable additions to many decks. In addition to possessing game-warping abilities, these mono-colored legendary elementals also play a central role in Bloomburrow's lore.
Is Bloomburrow Commander Deck Worth Buying? | Magic: The Gathering
In this context, a card cycle in MTG refers to a group of cards, usually one for each color, that share a thematic or mechanical similarity. For example, one of the most popular creature cycles is the Titan cycle, originally printed in M11. Now, Bloomburrow is bringing its own flavor to the mono-colored creature cycle with Calamity Beasts.
A 4/5 each elemental for four mana isn't bad, but with zero keyword abilities, Beza is mostly lazy on the battlefield. Her power comes solely from her enter-the-battlefield effect. White is known for blink strategies where creatures enter and re-enter the battlefield multiple times to maximize the benefit of their strong ETB abilities. Beza would fit perfectly in either of these decks.
By blinking her over and over again, a player could benefit from her abilities multiple times. Unfortunately, Beza's ETB effects are highly dependent on the board state. It is quite unlikely that a player can fully benefit from her abilities, even in a game of Commander with multiple opponents.