Monsters like Galaxy Wizard and Radius, the Half-Moon Dragon have effects that allow them to increase their levels to Level 8, while spell and trap cards such as Rank-Up-Magic Cipher Ascension or Constellar Belt are designed to bring out even stronger XYZ monsters or protect your Galaxy-Eyes monsters once theyre already on the field
For just 2 mana at instant speed, it makes all your permanents hexproof and indestructible until end of turn
Those that sac a set number tend to be easier to build around however not being able to kill Titans and some other big dorks is a bit of a problem these days, not to mention their doing nothing little other heavy artifact decks
Profts Eidetic Memory is an enchantment that adds counters to creatures based on how many cards youve drawn
In fact, they should use it for EVERYTHING
Animar can also be built around morph cards, which become free to play face-down once Animar has three or more counters