C20 Functional Bugs

- [x] Activating Netherborn Altar doesn't cause you to lose life

- [x] Flawless Maneuver (and all the other "free" cards) generate rollback errors when cast without a commander out

- [x] Boneyard Mycodrax is counting itself, which it shouldn't

- [x] Nascent Metamorph doesn't become a copy of the revealed creature

- [x] Cartographer's Hawk fetches lands into play untapped

- [x] When two people both have Bonder's Ornament out, tapping it to draw a card causes the player who tapped it to draw two, instead of each player drawing one.

- [x] In the event that Slippery Bogbonder enters with counter(s) on it (in this case, from Tayam), you don't seem to be able to move them as part of its ETB.

- [x] If you choose a creature to move counters with for Slippery Bogbonder, but then say you want to move zero counters, it throws a rollback error.

- [x] Decree of Justice asked you if you want to pay for 1/1s twice when cycling it

- [x] Curious Herd is creating 4/2 trample "a creature without a name" tokens.

- [x] Yannik, Scavenging Sentinel's exile effect doesn't do anything when it resolves; you don't get any choices and nothing is exiled

- [ ] It looks like effects that give planeswalkers protection (Eon Frolicker, Razor Barrier) aren't preventing loyalty loss when those walkers take damage, i.e. from Storm's Wrath.

- [x] Fireflux Squad says "Select a"

- [x] Gavi, Nest Warden's cost reduction is not optional; it won't let you choose to pay for the first spell

- [x] Gavi, Nest Warden doesn't let you pay zero instead of two life to cycle Street Wraith

- [x] Spellpyre Phoenix is not returning to hand on end step after cycling two cards (no trigger ever happens)

- [x] Even though Predatory Impulse is creating the "Must be Blocked" text on the opponent's creatures, they aren't actually being forced to block

- [x] Ravenous Gigantotherium's fight isn't actually letting you fight anything

- [ ] Akim, the Soaring Wind has a weird line about whether you've made a token yet this turn - and it has it all the time, *even if you have*.

- [x] When being asked to choose creatures with Lifelink or Deathtouch for Selective Adaptation, for some reason I can only pick one of the two Gifted Aetherborn in my top 7
Same issue with Zetalpas here:

- [x] After you choose cards for Selective Adaptation... it lets you pick one of the cards you *didn't* choose to go onto the battlefield, when it should be one of the cards you did choose.

- [x] Kathril, Aspect Warper doesn't tell you which ability (i.e. flying, trample, etc) you're picking for each time, so it gets very confusing if you have multiple to choose for

- [ ] Boneyard Mycodrax isn't using Last Known Information correctly. If I have a 0/0 Mycodrax as the only card in my graveyard and a 1/1 Mycodrax in play, Scavenging onto a third creature kills the Mycodrax in play, but should still give 0 counters because Scavenge checks LKI, and the Mycodrax was a 0/0 when I exiled it. Currently, it's incorrectly giving one counter.
Relevant Gatherer ruling:

- [x] Yannik, Scavenging Sentinel now asks you to pick a creature you control when it enters the battlefield... but it doesn't do anything to that creature. No exile, no effects.

- [x] If you choose to pay 0 with Gavi, Nest Warden it doesn't cycle the card - it just draws you another one.

- [ ] When you cycle Decree of Justice and choose an amount to pay (let's say 4), then it should ask you to pay 4 instead of asking you to pay X. Perhaps for the same reason, auto-pay isn't working; it asks you for each land what color of mana you want to tap it for, despite that being irrelevant.

- [ ] Manascape Refractor doesn't turn into a creature when activating Faire Concalve's creatureland ability. Same issue with Stalking Stones and other creaturelands.

- [ ] Manascape Refractor struggles with cards that name something on ETB, like Cavern of Souls. It reports it as Null, sometimes, and other times it looks like it grabs the last thing that was named in the game, i.e. here where it thinks it can add for humans, even though the land in play has named advisor:
What it *should* be doing is adding a mana of any color, but not letting you spend it on anything.

- [ ] If Manascape Refractor activates Hanweir Battlement's Meld ability with Hanweir Garrison, both the Refractor and the Garrison should be exiled, but should *not* Meld back in. Currently, they also Meld. See rule 701.36c.

- [x] Manascape Refractor is entering with an energy when Aether Hub is in play, which is wrong; that's not an activated ability. It also gets to hideaway when a Mosswort Bridge is in play, and otherwise seems to grab ETB effects that it shouldn't.

- [x] Manascape Refractor isn't picking up the 0:switch power ability from Wandering Fumarole after it turns into a creature. It also doesn't grab Riftstone Portal's ability for lands to tap for W or G. Looks like it generically misses passives that apply to lands but aren't innate to them.

- [x] Any Manascape Refractors in play immediately become Merit Lage tokens when you play Dark Depths, even though this is a triggered ability rather than an activated one. They also gain Sand Silos' storage counter ability and ability to not untap each upkeep, as well as Forsaken City's exile ability and failure to untap.

- [x] Manascape Refractor is missing a 'has' in the hovertext

- [x] Manascape Refractor doesn't play well with Urza Lands - if you have two of them and the opponent has one, you should be able to tap it as the one they have and get the bonus mana. I.e., this should tap for CCC (but currently does not):

- [x] Nikara, Lair Scavenger's hover text ability is missing the part about needing a counter on it: