Kelpie del río

07/06/13

If a token with no -1/-1 counters on it has persist, the ability will trigger when the token is put into the graveyard. However, the token will cease to exist and can’t return to the battlefield.

07/06/13

If multiple creatures with persist are put into the graveyard at the same time (due to combat damage or a spell that destroys all creatures, for example), the active player (the player whose turn it is) puts all of their persist triggers on the stack in any order, then each other player in turn order does the same. The last trigger put on the stack is the first one that resolves. That means that in a two-player game, the nonactive player’s persist creatures will return to the battlefield first, then the active player’s persist creatures do the same. The creatures return to the battlefield one at a time.

07/06/13

The persist ability triggers when the permanent is put into a graveyard. Its last known information (that is, how the creature last existed on the battlefield) is used to determine whether it had a -1/-1 counter on it.

01/05/08

If you cast another artifact, creature, enchantment, or planeswalker spell from a graveyard, only the second ability triggers. That’s because the card is put onto the stack, not onto the battlefield.

01/05/08

If you play a land card from a graveyard (by using Crucible of Worlds, for example), only the first ability triggers. That’s because the land (which isn’t a spell) is put directly onto the battlefield from the graveyard.

01/05/08

River Kelpie doesn’t give you the ability to cast spells from graveyards. Its second ability merely triggers whenever a spell is cast this way (by using Memory Plunder, for example).