There are technically 26 different Magic: The Gathering color combinations that you could use when building a deck, and 25 of them have obscure lore-based names attached, which experienced players tend to use freely, but can be confusing for newcomers
The other thing to watch for are the number of cards your opponents have in hand
Rayquaza already has the advantage of being a legendary Pokmon with a huge fanbase, but its Mega form takes that appeal even further with a longer, more explosive body shape and a sense of movement that suits the full art format perfectly
Motivated Pony Ostrich-Horse Sacred Prey Tarpan Temur Charger Thundering Mightmare Timbermare Vine Mare Wandermare Zodiac Horse
And it prevents all damage that would be dealt to you until your next turn
Beyond the names and creatures youd expect, this extends to creatures such as Bill the Pony