In D&D, conditions like charmed, creature types like beast, and descriptors like melee work as keywords
Who / What / Where / When / Why 5W is like a lot of flexible cards in that it isnt really efficient at doing anything specifically because each mode costs one more mana than the general cost (1R is the general cost of a Shatter effect, but on What it costs 2R) aside from the Stream of Life mode on Who, which is pretty suboptimal
If a card was played in a tournament more frequently, the cost of the card would be higher, in addition to the market availability of the card
Mangara is also a Cleric, so a Cleric Tribal deck like Ayli, Eternal Pilgrim
The adventure begins soon
This means it cannot attack or use certain abilities that cause the creature to tap