While Elusive Otter is a unique and versatile card, there may be better options depending on the specific strategy of your deck, such as Delver of Secrets or Nimble Obstructionist, which offer similar abilities with additional benefits
If you life total would be reduced to 0 or less, instead transform Enduring Angel and your life total becomes 3
Once you have a googleplex of colorless mana you cast fireball and win
As such, this card can be a good metagame call
Im not considering any cards that return lands from the graveyard to your hand or any game zone other than the battlefield but I have included a variety of cards that return permanents with mana value X or lesswhich includes lands as they have a mana value of 0
Eldrazi Conscription is amazing, of course, but this is a deck which can honestly run Colossification