I feel I should point out that the damage will never have a chance to kill this creature, even if it's 1/1. The damage is dealt just before the bond counter goes on, so there'll be a brief moment when it has 1 toughness and 2 damage, but state-based actions are only checked after resolution has finished, by which time the creature will have +5/+5.
Cool. I like this. The combination of effects is obviously powerful - getting you Legends and making your Legends better - but Wizards do that sometimes.
The only red flag here is the symbol. Enchantments don't tap. You could make this just cost mana - 5 mana is enough that it'll be hard to do that multiple times in a turn anyway. If you really wantto restrict it to once per turn, you could make it something like
> At the beginning of your upkeep / beginning of your end step, you may pay [cost]. If you do, search your library for a legendary creature card, reveal it, put it into your hand, then shuffle your library.
How would I word it so that it could kill a creature "not worthy/strong enough to become a Rider"?
I feel I should point out that the damage will never have a chance to kill this creature, even if it's 1/1. The damage is dealt just before the bond counter goes on, so there'll be a brief moment when it has 1 toughness and 2 damage, but state-based actions are only checked after resolution has finished, by which time the creature will have +5/+5.
Cool. I like this. The combination of effects is obviously powerful - getting you Legends and making your Legends better - but Wizards do that sometimes.
The only red flag here is the symbol. Enchantments don't tap. You could make this just cost mana - 5 mana is enough that it'll be hard to do that multiple times in a turn anyway. If you really wantto restrict it to once per turn, you could make it something like
> At the beginning of your upkeep / beginning of your end step, you may pay [cost]. If you do, search your library for a legendary creature card, reveal it, put it into your hand, then shuffle your library.