You may exile two green cards from your hand rather than pay this spell’s mana cost. Allosaurus Rider’s power and toughness are each equal to 1 plus the number of lands you control. 1+*/1+*
Search your library for up to X basic land cards, where X is the number of lands you control, put them onto the battlefield tapped, then shuffle.
Whenever another Merfolk you control enters, put a +1/+1 counter on target Merfolk you control. 1/1
Choose a permanent type. Return all cards of the chosen type from your graveyard to your hand. Flashback 5GG (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Until your next turn, all lands you control become 2/2 Elemental creatures with reach, indestructible, and haste. They're still lands.
Trample Cumulative upkeep—Put a +1/+1 counter on a creature an opponent controls. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Each creature you control assigns combat damage equal to its toughness rather than its power. {G}: Target creature with defender can attack this turn as though it didn’t have defender. {2}{G}: Creatures you control get +0/+1 until end of turn.
Play with the top card of your library revealed. You may play lands from the top of your library. Landfall — Whenever a land you control enters, you gain 1 life.
Hexproof (This creature can’t be the target of spells or abilities your opponents control.) Silhana Ledgewalker can’t be blocked except by creatures with flying.